Open AccessEFFECTS OF STRUCTURAL TRANSITION ON THE ELECTRICAL AND MAGNETIC PROPERTIES IN LIGHTLY DOPED La1-xSrxMnO3 PEROVSKITE
Author(s) -
Fuxiang Zhang,
Dahai He,
Xiangyi Zhang,
Xu Ying-Fan,
Wenkui Wang
Publication year - 1998
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.47.112
Subject(s) - materials science , condensed matter physics , polaron , ferromagnetism , spins , doping , structural change , spin glass , perovskite (structure) , phase transition , bond length , transition temperature , phase (matter) , manganite , trigonal crystal system , atmospheric temperature range , crystal structure , crystallography , chemistry , thermodynamics , superconductivity , physics , organic chemistry , quantum mechanics , electron , economics , macroeconomics
A structural transition from rhombohedral to cubic phase occurred in the lightly doped La1-xSrxMnO3 under high temperature and high pressure. The samples changed from an insulated (polaron ordering) state to metallic state after the phase transition. At the same time, the long-range ferromagnetic ordering of the spins of localized Mn ions collapsed into the spin glass state with only short-range ordering when the temperature decreased. The change of properties was due to the variation of Mn—O—Mn bond angle and Mn—O bond length during the structural transition.