检索结果-内蒙古大学图书馆

Characterization of magnetic properties of Sr2CuWO6 and Sr2CuMoO6

Physical Review B 2014年第13期89卷 134419-134419页

作者： Sami Vasala Hassan Saadaoui Elvezio Morenzoni Omar Chmaissem Ting-Shan Chan Jin-Ming Chen Ying-Ya Hsu Hisao Yamauchi Maarit Karppinen Department of Chemistry Aalto University FI-00076 AALTO Finland Laboratory for Muon Spin Spectroscopy Paul Scherrer Institute CH-5232 Villigen PSI Switzerland Department of Physics Northern Illinois University DeKalb Illinois 60115 USA Materials Science Division Argonne National Laboratory Argonne Illinois 60439 USA National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan Program for Science and Technology of Accelerator Light Source National Chiao Tung University Hsinchu 30076 Taiwan

In this work we examine the low-temperature magnetic properties of the two double-perovskite compounds Sr2CuWO6 and Sr2CuMoO6 using magnetic susceptibility, muon spin rotation and relaxation, and neutron powder diffraction measurements. Additionally, the most relevant spin exchange interaction constants are derived from ab initio electronic structure calculations, aided by x-ray absorption spectroscopy. The compounds exhibit quasi-two-dimensional magnetic properties, with broad maxima at Tmax = 83 and 95 K for Sr2CuWO6 and Sr2CuMoO6, respectively. However, three-dimensional long-range order takes place below TN = 24(1) and 28(2) K for Sr2CuWO6 and Sr2CuMoO6, respectively. Our results show that the low-dimensional magnetic correlations are mainly due to the significant next-nearest-neighbor interactions in the ab plane of the double-perovskite structure, whereas three-dimensional long-range magnetic order is caused by weaker next-nearest-neighbor interactions along the c axis. Next-nearest-neighbor interactions are also slightly frustrated by weaker nearest-neighbor interactions within the ab plane. Based on these results we predict the low-temperature magnetic structure in these compounds to be type-II antiferromagnetic order of the double-perovskite lattice.

关键词： MAGNETIC properties LOW temperatures OXIDE minerals PEROVSKITE MAGNETIC susceptibility

来源：评论

学校读者我要写书评

暂无评论

User Workshop on High-Power Lasers at the Linac Coherent light source

引用

Synchrotron Radiation News 2014年第2期27卷 56-58页

作者： Falcone, Roger Glenzer, Siegfried Hau-Riege, Stefan Lawrence Berkeley National Laboratory Advanced Light Source and University of California Berkeley Physics Department United States SLAC National Accelerator Laboratory Stanford Institute for Materials and Energy Sciences High-Energy-Density Science United States Lawrence Livermore National Laboratory Physical and Life Science Directorate X-ray Science and Technology United States

A two-day international workshop on the physics and integration of high-power lasers with the Linac Coherent light source was held in Stanford, California, USA, on October 1-2, 2013. The workshop was co-organized by UC Berkeley, Lawrence Berkeley, Lawrence Livermore, and SLAC National accelerator Laboratories. More than 150 scientists, including 30 students and postdocs who are working in high-intensity laser-matter interactions, fusion research, and dynamic high-pressure science, came together from North America, Europe, and Asia. The group discussed the most promising and important new physics experiments that will be enabled by the unique combination of high-power lasers and the world-class LCLS free-electron laser X-ray beam. © Copyright Taylor & Francis.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fabrication of graphene by electrochemical exfoliation in alkaline electrolytes

Fabrication of graphene by electrochemical exfoliation in al...

引用

作者： Chang, Li-Chung Hsieh, Yu-Chi Chen, Yong-Min Wu, Pu-Wei Lee, Jyh-Fu Graduate Program for Science and Technology of Accelerator Light Source China Department of Materials Science and Engineering National Chiao Tung University Hsin-Chu 30010 Taiwan Taiwan National Synchrotron Radiation Research Center Hsin-Chu 30076 Taiwan Taiwan

ISBN: (纸本)9781607685395

Fabrication of graphene was demonstrated by electrochemical exfoliation of graphite in an ammonium hydroxide solution. The processing parameter of applied voltage was optimized to accomplish graphene productivity and desired chemical composition. Images from the atomic force microscopy showed graphene sheets with lateral sizes of several hundred nanometers. Images from the transmission electron microscopy indicated the existence of stacked graphene sheets with thickness of a few graphene layers. Raman spectroscopy confirmed variation of assynthesized graphene and bulk graphite. X-ray photoemission spectroscopy suggested the formation of graphene oxide at large voltage. © 2014 The Electrochemical Society.

关键词： Graphene

来源：评论

学校读者我要写书评

暂无评论

Erratum: “Impact of symmetry on the ferroelectric properties of CaTiO3 thin films” [Appl. Phys. Lett. 106, 162904 (2015)]

引用

Applied Physics Letters 2015年第21期106卷

作者： Michael D. Biegalski Liang Qiao Yijia Gu Apurva Mehta Qian He Yayoi Takamura Albina Borisevich Long-Qing Chen 1Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA 2Department of Materials Science and Engineering Pennsylvania State University University Park Pennsylvania 16802 USA 3Stanford Synchrotron Light Source SLAC National Accelerator Laboratory Menlo Park California 94025 USA 4Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA 5Department of Chemical Engineering and Materials Science University of California-Davis Davis California 95616 USA

There is a typo of the space group. All the Pnmb should be Pbnm (or Pnma). So the Glazer notation should be changed to (a−a−c+) for Pbnm space group on page 4 o

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fabrication and ferroelectric properties of BiFeO3/LaNiO 3 artificial superlattice structures grown by radio-frequency magnetron-sputtering

Fabrication and ferroelectric properties of BiFeO3/LaNiO 3 a...

引用

作者： Liu, Yen-Ting Chiu, Shang-Jui Lee, Hsin-Yi Chen, San-Yuan Program for Science and Technology of Accelerator Light Source National Chiao Tung University Hsinchu Taiwan Department of Engineering and System Science National Tsing Hua University Hsinchu Taiwan National Synchrotron Radiation Research Center Hsinchu Taiwan Department of Materials Science and Engineering National Chiao Tung University Hsinchu Taiwan

Symmetric superlattice structures of multiferroic BiFeO3 and conductive LaNiO3 sublayers were grown on a Nb-doped SrTiO 3 substrate with radio-frequency magnetron-sputtering. The formation of a superlattice structure was confirmed from the appearance of satellite lines on both sides of the main line in the X-ray diffraction pattern. X-ray measurements show that these superlattice films become subject to greater tensile stress along the c-axis and to increased compressive stress parallel to the surface plane with a decreasing thickness of the sublayer. The smaller is the thickness of the sublayer, the greater is the crystalline quality and the strain state. The hysteresis loops show a large leakage current at frequencies of 0.5 and 1 kHz;the polarization decreases with an increasing frequency. © 2012 Elsevier B.V.

关键词： X ray scattering

来源：评论

学校读者我要写书评

暂无评论

Fluorescence: Dichotomy in the Lithiation Pathway of Ellipsoidal and Platelet LiFePO4Particles Revealed through Nanoscale Operando State‐of‐Charge Imaging (Adv. Funct. Mater. 24/2015)

引用

Advanced Functional Materials 2015年第24期25卷

作者： Yiyang Li Johanna Nelson Weker William E. Gent David N. Mueller Jongwoo Lim Daniel A. Cogswell Tolek Tyliszczak William C. Chueh Department of Materials Science and Engineering Stanford University 496 Lomita Mall Stanford CA 94305 USA Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo Park CA 94025 USA Department of Chemistry Stanford University 496 Lomita Mall Stanford CA 94305 USA Samsung Advanced Institute of Technology America One Cambridge Center STE #702 Cambridge MA 02142 USA Advanced Light Source Lawrence Berkeley National Laboratory One Cyclotron Road Berkeley CA 94720 USA Stanford Institute of Materials and Energy Sciences SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo Park CA 94025 USA

来源：评论

学校读者我要写书评

暂无评论

The structure and ferroelectric property of La-doped BiFeO 3/SrTiO3 artificial superlattice structure by rf sputtering: Effect of deposition temperature

The structure and ferroelectric property of La-doped BiFeO 3...

引用

作者： Chiu, Shang-Jui Liu, Yen-Ting Yu, Ge-Ping Lee, Hsin-Yi Huang, Jia-Hong Department of Engineering and System Science National Tsing Hua University Hsinchu 30013 Taiwan National Synchrotron Radiation Research Center Hsinchu Science Park 101 Hsin-Ann Road Hsinchu 30076 Taiwan Program for Science and Technology of Accelerator Light Source National Chiao Tung University Hsinchu 300 Taiwan Institute of Nuclear Engineering and Science National Tsing Hua University Hsinchu 30013 Taiwan

Improvement of ferroelectric property by Lanthanum (La)-doping of BiFeO3 (BFO) and strain effect of high quality superlattice films deposited at temperature â‰§ 700 C was shown in this study. The in-pane (200) radial scans showed that films at deposition temperature above 700 C behaved high strained ∼-1.4% and showed epitaxity properties. The La-doped BFO superlattice structure also behaved higher polarization value ∼ 197 μC/cm2 and lower leakage current density comparing with BFO superlattice structure shown in our previous study. The ferroelectric properties of superlattice structures are enhanced by lattice strain and strongly correlated with the defect state of films. © 2012 Elsevier B.V.

关键词： Semiconductor doping

来源：评论

学校读者我要写书评

暂无评论

Strain derivatives of Tc in HgBa2CuO4+δ: The CuO2 plane alone is not enough

引用

Physical Review B 2014年第2期89卷 024515-024515页

作者： Shibing Wang Jianbo Zhang Jinyuan Yan Xiao-Jia Chen Viktor Struzhkin Wojciech Tabis Neven Barišić Mun K. Chan Chelsey Dorow Xudong Zhao Martin Greven Wendy L. Mao Ted Geballe Department of Geological and Environmental Sciences Stanford University Stanford California 94305 USA SIMES SLAC National Accelerator Laboratory Menlo Park California 94025 USA Department of Physics South China University of Technology Guangzhou 510640 China Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 and Earth and Planetary Sciences University of California Santa Cruz California 95064 USA Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China School of Physics and Astronomy University of Minnesota Minneapolis Minnesota 55455 USA AGH University of Science and Technology Faculty of Physics and Applied Computer Science 30-059 Krakow Poland Service de Physique de l'Etat Condensé CEA-DSM-IRAMIS 91198 Gif-sur-Yvette France State Key Lab of Inorganic Synthesis and Preparative Chemistry Jilin University Changchun 130012 China Photon Science SLAC National Accelerator Laboratory Menlo Park California 94025 USA Department of Applied Physics and Geballe Laboratory for Advanced Materials Stanford University Stanford California 94305 USA

The strain derivatives of Tc along the a and c axes have been determined for HgBa2CuO4+δ (Hg1201), the simplest monolayer cuprate with the highest Tc of all monolayer cuprates (Tc = 97 K at optimal doping). The underdoped compound with the initial Tc of 65 K has been studied as a function of pressure up to 20 GPa by magnetic susceptibility and x-ray diffraction. The observed linear increase in Tc with pressure is the same as previously found for the optimally doped compound. The above results have enabled an investigation of the origins of the significantly different Tc values of optimally doped Hg1201 and the well-studied compound La2−xSrxCuO4 (LSCO), which has a maximal Tc of 40 K, or only 40% of that of Hg1201. Hg1201 can have almost identical CuO6 octahedra as LSCO if specifically strained. When the apical and in-plane CuO2 distances are the same for the two compounds, a large discrepancy in their Tc remains. Differences in crystal structures and interactions involving the Hg-O charge reservoir layers of Hg1201 may be responsible for the different Tc values exhibited by the two compounds.

关键词： MAGNETIC susceptibility MAGNETIC fields ELECTROMAGNETISM MAGNETISM STRAIN energy

来源：评论

学校读者我要写书评

暂无评论

Photoinduced melting of magnetic order in the correlated electron insulator NdNiO3

引用

Physical Review B 2013年第22期88卷 220401(R)-220401(R)页

作者： A. D. Caviglia M. Först R. Scherwitzl V. Khanna H. Bromberger R. Mankowsky R. Singla Y.-D. Chuang W. S. Lee O. Krupin W. F. Schlotter J. J. Turner G. L. Dakovski M. P. Minitti J. Robinson V. Scagnoli S. B. Wilkins S. A. Cavill M. Gibert S. Gariglio P. Zubko J.-M. Triscone J. P. Hill S. S. Dhesi A. Cavalleri Max-Planck Institute for the Structure and Dynamics of Matter Hamburg Germany Kavli Institute of Nanoscience Delft University of Technology Delft The Netherlands Département de Physique de la Matière Condensée University of Geneva Geneva Switzerland Department of Physics Clarendon Laboratory University of Oxford Oxford United Kingdom Diamond Light Source Chilton Didcot Oxfordshire United Kingdom Advanced Light Source Lawrence Berkeley Laboratory Berkeley California 94720 USA The Stanford Institute for Materials and Energy Sciences (SIMES) Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory and Stanford University Menlo Park California 94305 USA European XFEL GmbH Hamburg Germany Linac Coherent Light Source Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory Menlo Park California 94305 USA Swiss Light Source Paul Scherrer Institute CH-5232 Villigen PSI Switzerland Condensed Matter Physics and Materials Science Department Brookhaven National Laboratory Upton New York 11973 USA

Using ultrafast resonant soft x-ray diffraction, we demonstrate photoinduced melting of antiferromagnetic order in the correlated electron insulator NdNiO3. Time-dependent analysis of the resonant diffraction spectra allows us to follow the temporal evolution of the charge imbalance between adjacent Ni sites. A direct correlation between the melting of magnetic order and charge rebalancing is found. Furthermore, we demonstrate that the magnetic ordering on the Ni and Nd sites, which are locked together in equilibrium, become decoupled during this nonthermal process.

关键词： MELTING PHOTOINDUCED electron transfer ELECTRIC insulators & insulation ANTIFERROMAGNETIC materials EQUILIBRIUM

来源：评论

学校读者我要写书评

暂无评论

Real-Time Manifestation of Strongly Coupled Spin and Charge Order Parameters in Stripe-Ordered La1.75Sr0.25NiO4 Nickelate Crystals Using Time-Resolved Resonant X-Ray Diffraction

引用

Physical Review Letters 2013年第12期110卷 127404-127404页

作者： Y. D. Chuang W. S. Lee Y. F. Kung A. P. Sorini B. Moritz R. G. Moore L. Patthey M. Trigo D. H. Lu P. S. Kirchmann M. Yi O. Krupin M. Langner Y. Zhu S. Y. Zhou D. A. Reis N. Huse J. S. Robinson R. A. Kaindl R. W. Schoenlein S. L. Johnson M. Först D. Doering P. Denes W. F. Schlotter J. J. Turner T. Sasagawa Z. Hussain Z. X. Shen T. P. Devereaux Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 USA SLAC National Accelerator Laboratory Stanford Institute for Materials and Energy Sciences Menlo Park California 94025 USA Physics Division Lawrence Livermore National Laboratory Livermore California 94550 USA Department of Physics and Astrophysics University of North Dakota Grand Forks North Dakota 58202 USA Department of Physics Northern Illinois University DeKalb Illinois 60115 USA Swiss Light Source Paul Scherrer Institut CH-5232 Villigen-PSI Switzerland SLAC National Accelerator Laboratory Stanford PULSE Institute Menlo Park California 94025 USA Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park California 94025 USA European XFEL GmbH 22607 Hamburg Germany Linac Coherent Light Source SLAC National Accelerator Laboratory Menlo Park California 94720 USA Materials Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Max-Planck Department for Structural Dynamics Center for Free Electron Laser Science University of Hamburg 22761 Hamburg Germany Engineering Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Materials and Structures Laboratory Tokyo Institute of Technology Kanagawa 226-8503 Japan

We investigate the order parameter dynamics of the stripe-ordered nickelate, La1.75Sr0.25NiO4, using time-resolved resonant x-ray diffraction. In spite of distinct spin and charge energy scales, the two order parameters’ amplitude dynamics are found to be linked together due to strong coupling. Additionally, the vector nature of the spin sector introduces a longer reorientation time scale which is absent in the charge sector. These findings demonstrate that the correlation linking the symmetry-broken states does not unbind during the nonequilibrium process, and the time scales are not necessarily associated with the characteristic energy scales of individual degrees of freedom.

关键词： NICKEL -- Electrometallurgy X-ray diffraction BROKEN symmetry (Physics) ANTIFERROMAGNETISM SPIN-spin interactions

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：