Tuning exchange bias by thermal fluctuation in Fe52Mn23Ga25 melt-spun ribbons

被引：15

作者：

Tang, X. D. ^{[1
]}

Wang, W. H. ^{[1
]}

Wu, G. H. ^{[1
]}

Meng, F. B. ^{[2
]}

Liu, H. Y. ^{[2
]}

Luo, H. Z. ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 22期

基金：

中国国家自然科学基金;

关键词：

antiferromagnetic materials; exchange interactions (electron); ferromagnetic materials; gallium alloys; iron alloys; manganese alloys; melt spinning; ANISOTROPY;

D O I：

10.1063/1.3665037

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In Fe52Mn23Ga25 ribbons, the exchange bias becomes very sensitive to the proportions and sizes of the ferromagnetic (FM) and antiferromagnetic (AFM) phases. With high cooling fields, the AFM clusters with small sizes are embedded in the FM matrix which is kinetically arrested at low temperatures, resulting in a small exchange bias. The arrested FM phase can be dearrested by thermal fluctuation, and simultaneously, the proportion and sizes of AFM clusters increase with a stable unidirectional anisotropy. With different thermal fluctuations, a continuous tuning of exchange bias field from 0.202 kOe to 2.11 kOe is realized. (C) 2011 American Institute of Physics. [doi:10.1063/1.3665037]

引用

页数：3

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