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Title: The effect of hydrostatic pressure on magnetostructural transition in ferromagnetic cobaltite: Pr0.6Sr0.4CoO3
Authors: Chanda A. 
Kumari M. 
Mahendiran R. 
Issue Date: 2018
Publisher: American Institute of Physics Inc.
Citation: Chanda A., Kumari M., Mahendiran R. (2018). The effect of hydrostatic pressure on magnetostructural transition in ferromagnetic cobaltite: Pr0.6Sr0.4CoO3. AIP Advances 8 (10) : 101405. ScholarBank@NUS Repository.
Abstract: The ambient pressure temperature dependence of the magnetization (M) in P1-xSrxCoO3 series (x = 0.4, 0.5, 0.55 and 0.6) indicates the onset of ferromagnetic ordering at high temperatures (TC = 214-226K) and a step-like anomaly at lower temperatures (TS = 69-120 K). In this report we present the pressure dependence of magnetization and zero-field thermal expansion studies for a representative sample x = 0.4. The step-like anomaly in M(T) around TS = 69 K is accompanied by a pronounced peak in thermal expansion coefficient. The application of hydrostatic pressure of P = 1.16 GPa increases TS by 15 K, which is much larger than the increase of the ferromagnetic Curie temperature (?TC = 4 K) under the same pressure. The anomalous increase of TS under pressure is attributed to the occurrence of magnetization rotation at a temperature higher than TS = 69 K triggered by the stabilization of low temperature tetragonal phase at the expense of high temperature orthorhombic phase. © 2018 Author(s).
Source Title: AIP Advances
ISSN: 21583226
DOI: 10.1063/1.5043106
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