Size-dependent exchange bias in single phase Mn3O4 nanoparticles

doi:10.1088/1674-1056/25/11/117502

中国物理B ›› 2016, Vol. 25 ›› Issue (11): 117502-117502.doi: 10.1088/1674-1056/25/11/117502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Size-dependent exchange bias in single phase Mn₃O₄ nanoparticles

Song-Wei Wang(王松伟), Xin Zhang(张鑫), Rong Yao(姚蓉), Guang-Hui Rao(饶光辉)

1 School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China;
2 Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China

收稿日期:2016-07-03 修回日期:2016-07-26 出版日期:2016-11-05 发布日期:2016-11-05
通讯作者: Xin Zhang, Guang-Hui Rao E-mail:xzhang80@163.com;rgh@guet.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11464007), the Natural Science Foundation of Guangxi, China (Grant Nos. 2012GXNSFGA060002 and 2014GXNSFBA118241), the Guangxi Key Laboratory of Information Material Foundation, China (Grant No. 131021-Z), and the Guangxi Department of Education Foundation, China (Grant Nos. YB2014120 and KY2015YB104).

Size-dependent exchange bias in single phase Mn₃O₄ nanoparticles

Song-Wei Wang(王松伟)^1,2, Xin Zhang(张鑫)^1,2, Rong Yao(姚蓉)^1,2, Guang-Hui Rao(饶光辉)^1,2

1 School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China;
2 Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China

Received:2016-07-03 Revised:2016-07-26 Online:2016-11-05 Published:2016-11-05
Contact: Xin Zhang, Guang-Hui Rao E-mail:xzhang80@163.com;rgh@guet.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11464007), the Natural Science Foundation of Guangxi, China (Grant Nos. 2012GXNSFGA060002 and 2014GXNSFBA118241), the Guangxi Key Laboratory of Information Material Foundation, China (Grant No. 131021-Z), and the Guangxi Department of Education Foundation, China (Grant Nos. YB2014120 and KY2015YB104).

摘要/Abstract

摘要：

Glassy magnetic behavior and exchange bias phenomena are observed in single phase Mn₃O₄ nanoparticles. Dynamics scaling analysis of the ac susceptibility and the Henkel plot indicate that the observed glassy behavior at low temperature can be understood by taking into account the intrinsic behavior of the individual particles consisting of a ferrimagnetic (FIM) core and a spin-glass surface layer. Field-cooled magnetization hysteresis loops display both horizontal and vertical shifts. Dependence of the exchange bias field (H_E) on the cooling field shows an almost undamped feature up to 70 kOe, indicating the stable exchange bias state in Mn₃O₄.H_E increases as the particle size decreases due to the higher surface/volume ratio. The occurrence of the exchange bias can be attributed to the pinning effect of the frozen spin-glass surface layer upon the FIM core.

关键词: exchange bias, surface disorder, nanoparticles

Abstract:

Key words: exchange bias, surface disorder, nanoparticles

中图分类号: (Magnetic oxides)

75.47.Lx

75.50.Lk (Spin glasses and other random magnets) 75.50.Gg (Ferrimagnetics)

王松伟, 张鑫, 姚蓉, 饶光辉. Size-dependent exchange bias in single phase Mn₃O₄ nanoparticles[J]. 中国物理B, 2016, 25(11): 117502-117502.

Song-Wei Wang(王松伟), Xin Zhang(张鑫), Rong Yao(姚蓉), Guang-Hui Rao(饶光辉). Size-dependent exchange bias in single phase Mn₃O₄ nanoparticles[J]. Chin. Phys. B, 2016, 25(11): 117502-117502.

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Size-dependent exchange bias in single phase Mn₃O₄ nanoparticles

Size-dependent exchange bias in single phase Mn₃O₄ nanoparticles

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