Pressure effects on the magnetic transition temperature in ordered double perovskites

作     者：D. Di Castro P. Dore R. Khasanov H. Keller P. Mahadevan Sugata Ray D. D. Sarma P. Postorino 

作者机构：CNR-INFM Coherentia and Department of Mechanical Engineering University of Rome “Tor Vergata” Via del Politecnico 1 I-00133 Rome Italy CNR-INFM Coherentia and Dipartimento di Fisica Università di Roma “La Sapienza” P.le A. Moro 2 I-00185 Rome Italy Physik-Institut der Universität Zürich Winterthurerstrasse 190 CH-8057 Zürich Switzerland Laboratory for Muon Spin Spectroscopy Paul Scherrer Institut CH-5232 Villigen PSI Switzerland S.N. Bose National Center for Basic Sciences JD Block Sector III Kolkata 700098 India Solid State and Structural Chemistry Unit Indian Institute of Science Bangalore 560012 India Department of Materials Science Indian Association for the Cultivation of Science Kolkata 700032 India Centre for Advanced Materials Indian Association for the Cultivation of Science Kolkata 700032 India 

出 版 物：《Physical Review B》 (Phys. Rev. B Condens. Matter Mater. Phys.)

年 卷 期：2008年第78卷第18期

页      面：184416-184416页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：EU K. Alex Muller Foundation Department of Science and Technology, Government of India DAE- BRNS 

摘      要：A study of the pressure effect on the Curie temperature in polycrystalline ordered double perovskites was carried out by measuring the temperature dependence of the magnetization in isoelectronic Sr2FeMoO6, Ba2FeMoO6, and Ca2FeMoO6, and in W-substituted Sr2FeMo1−xWxO6 with x=0.70. Pressure up to approximately 10 kbar induces an increase in the Curie temperature in all the samples with different rate: dTc/dp results to be 1.7(2) K/kbar for Ba2FeMoO6, 0.60(8) K/kbar for Sr2FeMoO6, 0.25(8) K/kbar for Ca2FeMoO6, and 0.7(1) K/kbar for the W-substituted sample. The results are interpreted in terms of the different lattice structure and cell volume of the investigated systems. A manganitelike model was only partially successful in explaining the observed pressure behavior, thus, pointing out the different nature of the magnetic interaction in doped manganites and in ordered double perovskites.