Open AccessStudy of A-site disorder dependent structural properties and magnetic ordering in polycrystalline perovskite Sm0.5Ca0.5−xSrxMnO3
Author(s) -
M. A. A. Bally,
F.A. Khan,
Md. Atiqul Islam
Publication year - 2019
Publication title -
journal of physics communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.407
H-Index - 17
ISSN - 2399-6528
DOI - 10.1088/2399-6528/ab3336
Subject(s) - coercivity , curie temperature , orthorhombic crystal system , crystallite , spin glass , condensed matter physics , materials science , perovskite (structure) , analytical chemistry (journal) , doping , lattice constant , crystal structure , ferromagnetism , crystallography , chemistry , metallurgy , physics , chromatography , diffraction , optics
This paper reports the studies on the effect of A-site substitution by strontium on the structural properties and magnetic ordering in polycrystalline perovskite Sm 0.5 Ca 0.5−x Sr x MnO 3 (x = 0.1, 0.2 and 0.3). The investigated samples are prepared by conventional solid-state reaction technique. XRD analysis at room temperature has confirmed orthorhombic structure of the sample with space group Pnma. The dependence of structural parameter, Curie temperature and coercivity on Sr doping content has been thoroughly investigated. It is observed that substitution of Sr 2+ for Ca 2+ increases lattice parameter, tolerance factor and the Curie temperature. However, the coercivity (H c ) decreases with increasing Sr content while the charge ordering process is weakened with increasing Sr content. Field cooled (FC) and zero-field cooled (ZFC) dc magnetizations measurements at low field and low temperature indicate that there is a spin-glass (SG) like state occurred. Temperature dependent ac susceptibility at different frequency indicates a spin-glass-like transition of the sample.