Open AccessSpin-glass behavior and valence states of transition-metal ions of SrMn0.5Fe0.5O3
Author(s) -
Mei Ye,
Liang Chen,
Cao Yong-Zhen,
Liu Bao-qin,
He Jun-Hui,
Zengwei Zhu,
Z. A. Xu
Publication year - 2010
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.59.2795
Subject(s) - valence (chemistry) , materials science , rietveld refinement , octahedron , ion , paramagnetism , spin states , crystallography , x ray photoelectron spectroscopy , spin glass , crystallite , crystal structure , transition metal , perovskite (structure) , inorganic chemistry , condensed matter physics , nuclear magnetic resonance , chemistry , catalysis , physics , metallurgy , organic chemistry , biochemistry
Polycrystalline perovskite SrMn0.5Fe0.5O3 has been synthesized by solid state reaction method. The crystal structure, magnetic properties and valence states of Mn and Fe ions have been investigated. X ray diffraction (XRD) and subsequent Rietveld refinement confirmed that SrMn0.5Fe0.5O3 is found to be a primitive cubic crystal structureMn and Fe atoms randomly occupy the center of oxygen octahedron. Also with the measure of XPS which indicates that Mn ions show trivalent and tetravalent state, while Fe ions are in trivalent state. Paramagnetic phase was observed in high temperature (>230 K), the spin-glass behavior at low temperature (3+ ions located in the octahedral sites.