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Exchange bias effect in CaMn1-xRexO3

Abstract : Exchange bias effect in CaMn1-xRexO3 (x <= 0.1) has been investigated. The effect is very small in the samples doped at x = 0.02 and 0.04, but increases monotonously with further increase in Re doping. For x = 0.1, both vertical and horizontal shifts in hysteresis loop of field cooled sample decrease monotonously with increasing temperature and vanish above 70 K, while coercivity disappears only above 90 K upon approaching the N ' eel temperature. Exchange bias field, coercivity, and remanence asymmetry depend sensitively on temperature and maximal measuring field. Magnetic training effect has been studied for x = 0.06, 0.08, 0.1 samples and analyzed using a spin relaxation model. The observed exchange bias is attributed to the low-temperature phase separation into ferromagnetic clusters and the G-type and/or C-type antiferromagnetic matrix. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http//creativecommons.org/licenses/by/4.0/).
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Contributor : Elisabeth van T Hof <>
Submitted on : Friday, July 5, 2019 - 5:02:51 PM
Last modification on : Friday, November 22, 2019 - 12:14:08 PM

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V. Markovich, I. Fita, A. Wisniewski, R. Puzniak, Christine Martin, et al.. Exchange bias effect in CaMn1-xRexO3. AIP Advances, American Institute of Physics- AIP Publishing LLC, 2017, 7 (5), ⟨10.1063/1.4972798⟩. ⟨hal-02175451⟩

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