Magnetic phase separation and exchange bias in off-stoichiometric Ni-Mn-Ga alloys

被引：71
|
作者：
Han, Z. D. [1 ,2 ]
Qian, B. [1 ,2 ]
Wang, D. H. [3 ]
Zhang, P. [1 ]
Jiang, X. F. [1 ,2 ]
Zhang, C. L. [4 ]
Du, Y. W. [3 ]
机构：
[1] Changshu Inst Technol, Dept Phys, Changshu 215500, Peoples R China
[2] Changshu Inst Technol, Jiangsu Lab Adv Funct Mat, Changshu 215500, Peoples R China
[3] Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[4] Jiangnan Univ, Sch Sci, Wuxi 214122, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 17期
基金：
中国国家自然科学基金;
关键词：
DIAGRAM;
D O I：
10.1063/1.4826654
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetic phase separation and exchange bias effect in off-stoichiometric Ni2Mn1.4Ga0.6 alloy were reported. Spontaneous exchange bias after zero-field cooling was observed in this alloy. The magnetic nature of ground state was characterized as phase separation with non-percolated ferromagnetic domains in spin glass matrix due to the spatial composition fluctuation and competing ferromagnetic and antiferromagnetic interactions. A mechanism of field-induced growth of ferromagnetic domains changing from non-percolating to percolating state was proposed for the appearance of spontaneous exchange bias. (C) 2013 AIP Publishing LLC.
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页数：5
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