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Investigation of closing surge in shinkansen power system and proposal of a novel power electronics application for changeover section

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IEEJ Transactions on Industry Applications 2006年第7期126卷 857-864页

作者： Hayashiya, Hitoshi Ueda, Yoshinobu Ajiki, Koji Watanabe, Hideo Ando, Masato Nakajima, Makoto East Japan Railway Company Technical Center R and D Center of JR East Group 2-0 Nisshin-cho Saitama-shi Saitama 331-8513 Japan Meidensha Corporation Riverside Building 36-2 Nihonbashi Hakozakicho Chuo-ku Tokyo 103-8515 Japan Railway Technical Research Institute Power Supply Technology Division 2-89-38 Hikari-cho Kokubunji-shi Tokyo 185-8540 Japan JR East Meidensha Co. R and D Center JR East Group IEEEJ Japan Society of Applied Electromagnetics Meidensha Corporation Japan National Railway Railway Technical Research Institute High Voltage and Insulation Technology of Railway Power System Head Office of JR East Tokyo Substation Technology Center Tokyo Branch Office

The transient surge measurements at the changeover sections of Shinkansen power feeding system were carried out in some substations and sectioning posts. The detail of the surge voltage phenomena was investigated and the reason of the frequent discharge of the lightning arrester was clarified. As one of the solutions to avoid such a severe transient phenomena, a novel power supply system for a changeover section substitution for the conventional system with a pair of the vacuum switchgear was proposed. To realize a stable running through the changeover section where two power sources with phase difference are faced, some special control methods were introduced and their validities are confirmed by not only the computer simulations but also the mini-model experiments.

关键词： Power electronics

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Terrestrial Very-Long-Baseline Atom Interferometry: summary of the second workshop

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EPJ Quantum technology 2025年第1期12卷 42-42页

作者： Abdalla, Adam Abe, Mahiro Abend, Sven Abidi, Mouine Aidelsburger, Monika Alibabaei, Ashkan Allard, Baptiste Antoniadis, John Arduini, Gianluigi Augst, Nadja Balamatsias, Philippos Balaž, Antun Banks, Hannah Barcklay, rachel L. Barone, Michele Barsanti, Michele Bason, Mark G. Bassi, Angelo Bayle, Jean-Baptiste Baynham, Charles F. A. Beaufils, Quentin Beldjoudi, Sélyan Belić, Aleksandar Bennetts, Shayne Bernabeu, Jose Bertoldi, Andrea Bigard, Clara Bigelow, N.P. Bingham, robert Blas, diego Bobrick, Alexey Boehringer, Samuel Bogojević, Aleksandar Bongs, Kai Bortoletto, daniela Bouyer, Philippe Brand, Christian Buchmueller, Oliver Buica, Gabriela Calatroni, Sergio Calmels, Léo Canizares, Priscilla Canuel, Benjamin Caramete, Ana Caramete, Laurentiu-Ioan Carlesso, Matteo Carlton, John Carman, Samuel P. Carroll, Andrew Casariego, Mateo Chairetis, Minoas Charmandaris, Vassilis Chauhan, Upasna Chen, Jiajun Chiofalo, Maria Luisa Maria Luisa Marilù Ciampini, donatella Cimbri, Alessia Cladé, Pierre Coleman, Jonathon Constantin, Florin Lucian Contaldi, Carlo r. Corgier, robin dash, Bineet davies, G.J. de rham, Claudia de roeck, Albert derr, daniel dey, Soumyodeep di Pumpo, Fabio djordjevic, Goran S. döbrich, Babette dornan, Peter doser, Michael drougakis, Giannis dunningham, Jacob duspayev, Alisher Easo, Sajan Eby, Joshua Efremov, Maxim Elertas, Gedminas Ellis, John Entin, Nicholas Fairhurst, Stephen Fanì, Mattia Fassi, Farida Fayet, Pierre Felea, daniel Feng, Jie Flack, robert Foot, Chris Freegarde, Tim Fuchs, Elina Gaaloul, Naceur Gao, dongfeng Gardner, Susan Garraway, Barry M. Garrido Alzar, Carlos L. Gauguet, Alexandre Giese, Enno Gill, Patrick Giudice, Gian F. Glasbrenner, Eric P. Glick, Jonah Graham, Peter W. Granados, Eduardo Griffin, Paul F. Gué, Jordan Guellati-Khelifa, Saïda Gupta, Subhadeep Gupta, Vishu Hackermueller, Lucia Haehnelt, Martin Hakulinen, Timo Hammerer, Klemens Hanımeli, Ekim T. Harte, Tiffany Hartmann, Sabrina Hawkins, Leonie Hees, Aurelien Herbst, Alexander Hird, Thomas M. Hobson, richard Hogan, Jaso Fachbereich Physik Institut für Angewandte Physik Technische Universität Darmstadt Schlossgartenstrasse 7 Darmstadt64289 Germany Department of Physics Stanford University StanfordCA94305 United States Institut für Quantenoptik Leibniz Universität Hannover Welfengarten 1 Hannover30167 Germany Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Strasse 1 Garching85748 Germany Fakultät für Physik Ludwig-Maximilians-Universität Schellingstrasse 4 Munich80799 Germany Schellingstrasse 4 Munich80799 Germany Laboratoire Collisions Agrégats Réactivité UMR5589 University of Toulouse III Paul Sabatier CNRS 118 Route de Narbonne Toulouse France Heraklion70013 Greece CERN CH-1211 Geneva 23 Switzerland Wilhelm-Runge-Straße 10 Ulm89081 Germany BEC and Matterwave Optics Group Institute of Electronic Structure and Lasers Foundation for Research and Technology - Hellas Nikolaou Plastira 100 Crete70013 Greece Institute of Physics Belgrade University of Belgrade Pregrevica 118 Belgrade11080 Serbia Serbian Academy of Sciences and Arts Kneza Mihaila 35 Belgrade11000 Serbia Department of Applied Mathematics and Theoretical Physics University of Cambridge Wilberforce Road CambridgeCB3 0WA United Kingdom Institute of Nuclear and Particle Physics NCSR Demokritos Neapoleos 27 & Patr. Grigoriou Street Ag. Paraskevi Attikis Athens15341 Greece Department of Civil and Industrial Engineering University of Pisa Largo Lucio Lazzarino Pisa56122 Italy RAL Space Rutherford Appleton Laboratory UKRI-STFC Fermi Avenue DidcotOX11 OQX United Kingdom Department of Physics University of Trieste Strada Costiera 11 Trieste34151 Italy Istituto Nazionale di Fisica Nucleare Trieste Section Via Valerio 2 Trieste34127 Italy University of Glasgow GlasgowG12 8QQ United Kingdom Physics Department Imperial College London Prince Consort Road LondonSW7 2AZ United Kingdom LNE-SYRTE Observatoire de Paris Université PSL CNRS Sorbonne Université Paris France Van der W

This summary of the second Terrestrial Very-Long-Baseline Atom Interferometry (TVLBAI) Workshop provides a comprehensive overview of our meeting held in London in April 2024 (Second Terrestrial Very-Long-Baseline Atom Interferometry Workshop, Imperial College, April 2024), building on the initial discussions during the inaugural workshop held at CErN in March 2023 (First Terrestrial Very-Long-Baseline Atom Interferometry Workshop, CErN, March 2023). Like the summary of the first workshop (Abend et al. in AVS Quantum Sci. 6:024701, 2024), this document records a critical milestone for the international atom interferometry community. It documents our concerted efforts to evaluate progress, address emerging challenges, and refine strategic directions for future large-scale atom interferometry projects. Our commitment to collaboration is manifested by the integration of diverse expertise and the coordination of international resources, all aimed at advancing the frontiers of atom interferometry physics and technology, as set out in a Memorandum of Understanding signed by over 50 institutions (Memorandum of Understanding for the Terrestrial Very Long Baseline Atom Interferometer Study). © The Author(s) 2025.

关键词： Atoms

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Pseudogap of Metallic Layered Nickelate r2−xSrxNiO4 (r=Nd,Eu) Crystals Measured Using Angle-resolved Photoemission Spectroscopy

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Physical review Letters 2011年第2期106卷 027001-027001页

作者： M. Uchida K. Ishizaka P. Hansmann Y. Kaneko Y. Ishida X. Yang r. Kumai A. Toschi Y. Onose r. Arita K. Held O. K. Andersen S. Shin Y. Tokura Department of Applied Physics University of Tokyo Tokyo 113-8656 Japan Institut for Solid State Physics Vienna University of Technology 1040 Vienna Austria Multiferroics Project ERATO Japan Science and Technology Agency (JST) Tokyo 113-8656 Japan Institute for Solid State Physics (ISSP) University of Tokyo Chiba 277-8561 Japan Max-Planck-Institut für Festkörperforschung D-70569 Stuttgart Germany National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba 305-8562 Japan RIKEN SPring-8 Center Hyogo 679-5148 Japan Cross-Correlated Materials Research Group (CMRG) and Correlated Electron Research Group (CERG) ASI RIKEN Wako 351-0198 Japan

We have investigated charge dynamics and electronic structures for single crystals of metallic layered nickelates, r2−xSrxNiO4 (r=Nd,Eu), isostructural to La2−xSrxCuO4. Angle-resolved photoemission spectroscopy on the barely metallic Eu0.9Sr1.1NiO4 (r=Eu, x=1.1) has revealed a large hole surface of x2−y2 character with a high-energy pseudogap of the same symmetry and comparable magnitude with those of underdoped (x<0.1) cuprates, although the antiferromagnetic interactions are 1 order of magnitude smaller. This finding strongly indicates that the momentum-dependent pseudogap feature in the layered nickelate arises from the real-space charge correlation.

关键词： Electronic structure

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Plasmonic nanoparticle-based surface-enhanced raman spectroscopy-guided photothermal therapy: emerging cancer theranostics

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Nanomedicine 2023年第6期18卷 555-576页

作者： Anindita das Hsieh-Chih Tsai Tapas Sen rakesh S Moirangthem Department of Physics Nanophotonics Lab Indian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826004 India Graduate Institute of Applied Science & Technology National Taiwan University of Science & Technology Taipei 106 Taiwan Advanced Membrane Materials Center National Taiwan University of Science & Technology Taipei 106 Taiwan R&D Center for Membrane Technology Chung Yuan Christian University Chungli Tao-Yuan 320 Taiwan Nano-biomaterials Research Group School of Natural Sciences Faculty of Science & Technology University of Central Lancashire Preston PR1 2HE UK Department of Physics Manipur University Canchipur Imphal Manipur 795003 India

Optical imaging modalities have emerged as a keystone in oncological research, capable of providing molecular and cellular information on cancer with the advantage of being minimally invasive toward healthy tissues. Photothermal therapy (PTT) has shown great potential, with the exceptional advantages of high specificity and noninvasiveness. Combining surface-enhanced raman spectroscopy (SErS)-based optical imaging with PTT has shown tremendous potential in cancer theranostics (therapeutics + diagnosis). This comprehensive review article provides up-to-date information by exploring recent works focused mainly on the development of plasmonic nanoparticles for medical applications using SErS-guided PTT, including the fundamental principles behind SErS and the plasmon heating effect for PTT.

关键词： cancer theranostics photothermal therapy plasmonic nanoparticles surface-enhanced raman spectroscopy surface functionalization toxicity

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SAFETY4rAILS Information System platform demonstration at Madrid Metro simulation exercise 32nd

SAFETY4RAILS Information System platform demonstration at Ma...

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32nd European Safety and reliability Conference, ESrEL 2022

作者： Crabbe, Stephen roß, Katharina Köpke, Corinna Faist, Katja Medina, Eduardo Villamor Siebold, Uli Cazzato, Eros Mádi-Nátor, Anett Ben-Yizhak, Eli Peled, Ido Kanak, Alper Ugur, Niyazi Ergun, S.Halit Ergun, Salih Tiemann, Marco Bonneau, Marie-Hélène Bourdache, Kaci Savolainen, Jari Thomopoulos, Stelios C. A. Kyriakopoulos, Christos Panou, Konstantinos de Laporte, Antonio Santiago Matsika, Emmanuel david, raphael Costa, Emiliano Siino, Giulia Setunge, Sujeeva Mahmoodian, Mojtaba Naderpajouh, Nader Ottonello, davide Silva, Tatiana Prada, Alejandro Georgakopoulos, Andreas Giannopoulou, Eleni Mitrou, Michalis Stavroulaki, Vera Fraunhofer Institute for High-Speed Dynamics Ernst-Mach-Institut Germany ETRA Spain CuriX AG Switzerland Cyber Services Plc Hungary Elbit Systems C4I and Cyber Israel Ergünler Co. R and D Center Erarge Turkey Innova Integra Ltd United Kingdom International Union of Railways France Laurea University of Applied Sciences Finland National Center for Scientific Research "Demokritos" Greece Metro de Madrid Spain Future Mobility Group – NewRail Newcastle University United Kingdom RINA Italy RMIT Europe Spain RMIT University Australia The University of Sydney Australia Stam S.r.l Italy Tree Technology Spain WINGS ICT SOLUTIONS Greece

ISBN: (纸本)9789811851834

SAFETY4rAILS is the acronym for the European Union Horizon 2020 co-funded innovation project entitled: "data-based analysis for safety and security protection for detection, prevention, mitigation and response in transmodal metro and railway networks" which started in October 2020. Its focus is to support the increase of security and resilience against combined cyber-physical threats including natural hazards to railway and metro systems. Its objectives target capabilities to support the characteristics of resilient systems;resilience represented by cycles containing phases of identification, protection, detection, response and recovery (department of Communications 2019) (or similarly named phases). An ESrEL paper in 2021 introduced the SAFETY4rAILS project and the SAFETY4rAILS Information System platform as well as some of the tools that are included in the platform. This paper will describe the architectural solution implemented for the platform in the last year and the demonstration of representative capabilities from the first simulation exercise with Madrid Metro at the beginning of 2022. © 2022 ESrEL2022 Organizers. Published by research Publishing, Singapore.

关键词： Subways

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The PLATO mission

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Experimental Astronomy 2025年第3期59卷 1-111页

作者： rauer, Heike Aerts, Conny Cabrera, Juan deleuil, Magali Erikson, Anders Gizon, Laurent Goupil, Mariejo Heras, Ana Walloschek, Thomas Lorenzo-Alvarez, Jose Marliani, Filippo Martin-Garcia, César Mas-Hesse, J. Miguel O’rourke, Laurence Osborn, Hugh Pagano, Isabella Piotto, Giampaolo Pollacco, don ragazzoni, roberto ramsay, Gavin Udry, Stéphane Appourchaux, Thierry Benz, Willy Brandeker, Alexis Güdel, Manuel Janot-Pacheco, Eduardo Kabath, Petr Kjeldsen, Hans Min, Michiel Santos, Nuno Smith, Alexis Suarez, Juan-Carlos Werner, Stephanie C. Aboudan, Alessio Abreu, Manuel Acuña, Lorena Adams, Moritz Adibekyan, Vardan Affer, Laura Agneray, François Agnor, Craig Aguirre Børsen-Koch, Victor Ahmed, Saad Aigrain, Suzanne Al-Bahlawan, Ashraf Alcacera Gil, Ma de los Angeles Alei, Eleonora Alencar, Silvia Alexander, richard Alfonso-Garzón, Julia Alibert, Yann Allende Prieto, Carlos Almeida, Leonardo Alonso Sobrino, roi Altavilla, Giuseppe Althaus, Christian Alvarez Trujillo, Luis Alonso Amarsi, Anish Ammler-von Eiff, Matthias Amôres, Eduardo Andrade, Laerte Antoniadis-Karnavas, Alexandros António, Carlos Aparicio del Moral, Beatriz Appolloni, Matteo Arena, Claudio Armstrong, david Aroca Aliaga, Jose Asplund, Martin Audenaert, Jeroen Auricchio, Natalia Avelino, Pedro Baeke, Ann Baillié, Kevin Balado, Ana Ballber Balagueró, Pau Balestra, Andrea Ball, Warrick Ballans, Herve Ballot, Jerome Barban, Caroline Barbary, Gaële Barbieri, Mauro Barceló Forteza, Sebastià Barker, Adrian Barklem, Paul Barnes, Sydney Barrado Navascues, david Barragan, Oscar Baruteau, Clément Basu, Sarbani Baudin, Frederic Baumeister, Philipp Bayliss, daniel Bazot, Michael Beck, Paul G. Belkacem, Kevin Bellinger, Earl Benatti, Serena Benomar, Othman Bérard, diane Bergemann, Maria Bergomi, Maria Bernardo, Pierre Biazzo, Katia Bignamini, Andrea Bigot, Lionel Billot, Nicolas Binet, Martin Biondi, david Biondi, Federico Birch, Aaron C. Bitsch, Bertram Bluhm Ceballos, Paz Victoria Bódi, Attila Bognár, Zsófia Boisse, Isabelle Bolmont, Emeline Bonanno, Alfio Bonavita, Institut für Planetenforschung Deutsches Zentrum für Luft- und Raumfahrt DLR Rutherfordstrasse 2 Berlin 12489 Germany Fachbereich Geowissenschaften Institut für Geologische Freie Universität Berlin Malteserstr. 74-100 Berlin 12249 Germany Institute of Astronomy KU Leuven Leuven Belgium CNRS CNES LAM Aix Marseille University Marseille France Max Planck Institute for Solar System Research Göttingen Germany LESIA Paris Observatory PSL University Sorbonne University Paris Cité University CNRS Meudon France ESTEC European Space Agency Noordwijk Netherlands ESAC European Space Agency Madrid Spain Centro de Astrobiología CSIC-INTA Campus ESAC Madrid Spain Center for Space and Habitability University of Bern Bern Switzerland INAF - Osservatorio Astrofisico di Catania Catania Italy Department of Physics and Astronomy University of Padua Padua Italy Department of Physics University of Warwick Coventry United Kingdom Astronomical Observatory of Padova INAF - Italian National Institute for Astrophysics Padua Italy Armagh Observatory and Planetarium College Hill Armagh United Kingdom Geneve Observatory University of Geneve Geneve Switzerland IAS University of Paris-Saclay Orsay France AlbaNove University Centre Stockholm University Stockholm Sweden Department of Astrophysics University of Vienna Vienna Austria Department of Astronomy University of Sao Paulo Sao Paulo Brazil Astronomical Institute of the Czech Academy of Sciences Ondřejov Czech Republic Department of Physics and Astronomy Aarhus University Aarhus Denmark Institute for Space Research SRON Leiden Netherlands Instituto de Astrofísica e Ciências do Espaço CAUP Universidade do Porto Porto Portugal Departamento de Física e Astronomia Faculdade da Ci ncias Universidade do Porto Porto Portugal Mullard Space Science Laboratory University College London Holmbury Saint Mary United Kingdom Dept. Theoretical Physics and the Cosmos University of Granada Granada Spain Centre for Plan

PLATO (PLAnetary Transits and Oscillations of stars) is ESA’s M3 mission designed to detect and characterise extrasolar planets and perform asteroseismic monitoring of a large number of stars. PLATO will detect small planets (down to <2rEarth) around bright stars (<11 mag), including terrestrial planets in the habitable zone of solar-like stars. With the complement of radial velocity observations from the ground, planets will be characterised for their radius, mass, and age with high accuracy (5%, 10%, 10% for an Earth-Sun combination respectively). PLATO will provide us with a large-scale catalogue of well-characterised small planets up to intermediate orbital periods, relevant for a meaningful comparison to planet formation theories and to better understand planet evolution. It will make possible comparative exoplanetology to place our Solar System planets in a broader context. In parallel, PLATO will study (host) stars using asteroseismology, allowing us to determine the stellar properties with high accuracy, substantially enhancing our knowledge of stellar structure and evolution. The payload instrument consists of 26 cameras with 12cm aperture each. For at least four years, the mission will perform high-precision photometric measurements. Here we review the science objectives, present PLATO‘s target samples and fields, provide an overview of expected core science performance as well as a description of the instrument and the mission profile towards the end of the serial production of the flight cameras. PLATO is scheduled for a launch date end 2026. This overview therefore provides a summary of the mission to the community in preparation of the upcoming operational phases. © The Author(s) 2025.

关键词： Asteroseismology Exoplanets PLATO mission

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Tracing intermolecular Coulombic decay of carbon-dioxide dimers and oxygen dimers after valence photoionization

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Physical review A 2019年第4期99卷 043414-043414页

作者： W. Iskandar A. S. Gatton B. Gaire F. P. Sturm K. A. Larsen E. G. Champenois N. Shivaram A. Moradmand J. B. Williams B. Berry T. Severt I. Ben-Itzhak d. Metz H. Sann M. Weller M. Schoeffler T. Jahnke r. dörner d. Slaughter Th. Weber Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Graduate Group in Applied Science and Technology University of California Berkeley California 94720 USA Department of Physics Auburn University Auburn Alabama 36849 USA Department of Physics University of Nevada Reno Nevada 89557 USA J. R. Macdonald Laboratory Department of Physics Kansas State University Manhattan Kansas 66506 USA Institut für Kernphysik Goethe-Universitaet Max-von-Laue-Strasse 1 D-60438 Frankfurt am Main Germany

We have conducted an experimental study on the photo double ionization (PdI) of carbon-dioxide dimers at photon energies of 37 and 55 eV and oxygen dimers at photon energies of 38, 41.5, and 46 eV, while focusing on the dissociation dynamics upon single-photon absorption. The investigation was performed by applying the cold-target recoil-ion momentum spectroscopy method in order to collect and record the three-dimensional momenta of the ionic fragments and emitted electrons from the dissociating dimer in coincidence. The kinetic-energy release upon fragmentation and the electron angular distributions in the laboratory and body-fixed frames, as well as the relative electron-electron emission angle, show unambiguous experimental evidence of intermolecular Coulombic decay (ICd) in carbon-dioxide dimers upon photoionization below and above the double-ionization threshold of CO2 monomers. The PdI of oxygen dimers is less conclusive and shows contributions from ICd and knock-off ionization mechanisms. As for atomic dimers, the present results reveal that ICd in CO2 dimers after valence PdI can also serve as a source for low-energy electrons, known to be very relevant in biological systems, cells, and tissues.

关键词： Atomic & molecular clusters Autoionization & Auger processes Chemical binding Electronic transitions Photodissociation Single- and few-photon ionization & excitation Ultrafast phenomena Van der Waals interaction

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detector-Agnostic Phase-Space distributions

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Physical review Letters 2020年第1期124卷 013605-013605页

作者： J. Sperling d. S. Phillips J. F. F Bulmer G. S. Thekkadath A. Eckstein T. A. W. Wolterink J. Lugani S. W. Nam A. Lita T. Gerrits W. Vogel G. S. Agarwal C. Silberhorn I. A. Walmsley Integrated Quantum Optics Group Applied Physics University of Paderborn 33098 Paderborn Germany Clarendon Laboratory University of Oxford Parks Road Oxford OX1 3PU United Kingdom National Institute of Standards and Technology 325 Broadway Boulder Colorado 80305 USA Institut für Physik Universität Rostock Albert-Einstein-Straße 23 D-18059 Rostock Germany Texas A&M University College Station Texas 77845 USA

The representation of quantum states via phase-space functions constitutes an intuitive technique to characterize light. However, the reconstruction of such distributions is challenging as it demands specific types of detectors and detailed models thereof to account for their particular properties and imperfections. To overcome these obstacles, we derive and implement a measurement scheme that enables a reconstruction of phase-space distributions for arbitrary states whose functionality does not depend on the knowledge of the detectors, thus defining the notion of detector-agnostic phase-space distributions. Our theory presents a generalization of well-known phase-space quasiprobability distributions, such as the Wigner function. We implement our measurement protocol, using state-of-the-art transition-edge sensors without performing a detector characterization. Based on our approach, we reveal the characteristic features of heralded single- and two-photon states in phase space and certify their nonclassicality with high statistical significance.

关键词： Optical tests of quantum theory Quantum measurements Quantum optics Quantum states of light Phase space methods

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Structural and magnetic phase transitions of the orthovanadates rVO3 (r= dy, Ho, Er) as seen via neutron diffraction

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Physical review B 2011年第6期83卷 064404-064404页

作者： M. reehuis C. Ulrich K. Prokeš S. Mat'aš J. Fujioka S. Miyasaka Y. Tokura B. Keimer Helmholtz-Zentrum Berlin für Materialien und Energie D-14109 Berlin Germany Max-Planck-Institut für Festkörperforschung D-70569 Stuttgart Germany Australian Nuclear Science and Technology Organisation (ANSTO) Postal Mail Box 1 Menai New South Wales 2234 Australia University of New South Wales Sydney New South Wales 2052 Australia Department of Applied Physics University of Tokyo 113 Tokyo Japan Multiferroics Project ERATO Japan Science and Technology Agency Wako 351-0198 Japan Department of Physics Graduate School of Science Osaka University Osaka 560-0043 Japan Cross-Correlated Materials Research Group (CMRG) and Correlated Electron Research Group (CERG) RIKEN Advanced Science Institute Wako 351-0198 Japan

The structural and magnetic phase behavior of rVO3 with r=v dy, Ho, and Er was studied by single-crystal neutron diffraction. Upon cooling, all three compounds show structural transitions from orthorhombic (space group Pbnm) to monoclinic (p21/b) symmetry due to the onset of orbital order at T= 188–200 K, followed by Néel transitions at T= 110–113 K due to the onset of antiferromagnetic (C-type) order of the vanadium moments. Upon further cooling, additional structural phase transitions occur for dyVO3 and ErVO3 at 60 and 56 K, respectively, where the monoclinic structure changes to an orthorhombic structure with the space group Pbnm, and the magnetic order of the V sublattice changes to a G-type structure. These transition temperatures are reduced compared to the ones previously observed for nonmagnetic r3+ ions due to exchange interactions between the V3+ and r3+ ions. For ErVO3, r-r exchange interactions drive a transition to collinear magnetic order at T= 2.5 K. For HoVO3, the onset of noncollinear, weakly ferromagnetic order of the Ho moments nearly coincides with the structural phase transition from the monoclinic to the low-temperature orthorhombic structure. This transition is characterized by an extended hysteresis between 24 and 36 K. The dy moments in dyVO3 also exhibit noncollinear, weakly ferromagnetic order upon cooling below 13 K. With increasing temperature, the monoclinic structure of dyVO3 reappears in the temperature range between 13 and 23 K. This reentrant structural transition is associated with a rearrangement of the dy moments. A group theoretical analysis showed that the observed magnetic states of the r3+ ions are compatible with the lattice structure. The results are discussed in the light of recent data on the magnetic field dependence of the lattice structure and magnetization of dyVO3 and HoVO3.

关键词： PHASE transformations (Physics) NEUTrON diffraction ANTIFErrOMAGNETISM MAGNETIZATION MAGNETIC fields MAGNETIC properties of vanadium

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Erratum to “Chronological correlations between the Pilbara and Kaapvaal cratons”

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Precambrian research 2001年第3-4期112卷 331-332页

作者： david r. Nelson Alec F. Trendall Wladyslaw Altermann Geological Survey of Western Australia Mineral House 100 Plain Street East Perth WA 6004 Australia Western Australian Isotope Studies Research Group Department of Applied Physics Curtin University of Technology GPO Box U1987 Perth WA 6001 Australia Institut für Allgemeine und Angewandte Geologie Luisenstrasse 37 Lugwig Maximilians Universität München D-80333 München Germany

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