Multiple sign reversals of the exchange bias field in polycrystalline SmCr0.9Fe0.1O3

doi:10.1088/1674-1056/23/12/127502

Abstract

We synthesize the perovskite compound SmCr_0.9Fe_0.1O₃ by the sol–gel method and investigate its exchange bias properties through thermomagnetic and isothermal magnetization measurements. The sign reversals of the exchange bias field are observed at the magnetization compensation temperatures 29.6 K and 96.2 K. It is demonstrated that the occurrence of the exchange bias originates from the antiferromagnetic coupling between the Cr-rich and Fe–Cr regions, of which the net magnetization is temperature-dependent. These results imply that there are potential applications in single systems with sign reversals of both magnetization and exchange bias.

Keywords: magnetism antiferromagnetic exchange bias

Received: 20 May 2014
Revised: 04 August 2014
Accepted manuscript online:

PACS:	75.50.Gg	(Ferrimagnetics)
	75.50.Ee	(Antiferromagnetics)
	75.30.Et	(Exchange and superexchange interactions)

Fund:

Project supported by the National Basic Research Program of China (Grant Nos. 2014AA032904 and 2009CB929501) and the National Natural Science Foundation of China (Grant Nos. 11174130 and U1232210).

Corresponding Authors: Cao Qing-Qi
E-mail: qqcao@nju.edu.cn

Cite this article:

Fang Yong (房勇), Yan Shi-Ming (颜士明), Gong Yuan-Yuan (龚元元), Zhu Wei-Li (朱卫利), Cao Qing-Qi (曹庆琪), Wang Dun-Hui (王敦辉), Du You-Wei (都有为) Multiple sign reversals of the exchange bias field in polycrystalline SmCr_0.9Fe_0.1O₃ 2014 Chin. Phys. B 23 127502


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Multiple sign reversals of the exchange bias field in polycrystalline SmCr0.9Fe0.1O3

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Multiple sign reversals of the exchange bias field in polycrystalline SmCr_0.9Fe_0.1O₃