Intermartensitic Transformation and Enhanced Exchange Bias in Pd (Pt) -doped Ni-Mn-Sn alloys

被引：17

作者：

Dong, S. Y. ^{[1
,2
]}

Chen, J. Y. ^{[1
,2
]}

Han, Z. D. ^{[1
,2
]}

Fang, Y. ^{[1
]}

Zhang, L. ^{[1
]}

Zhang, C. L. ^{[3
]}

Qian, B. ^{[1
]}

Jiang, X. F. ^{[1
]}

机构：

[1] Changshu Inst Technol, Dept Phys, Jiangsu Lab Adv Funct Mat, Changshu 215500, Peoples R China

[2] China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China

[3] Jiangnan Univ, Sch Sci, Wuxi 214122, Peoples R China

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

中国国家自然科学基金;

关键词：

INDUCED SHAPE RECOVERY; HEUSLER ALLOYS; TEMPERATURE; GA;

D O I：

10.1038/srep25911

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In this work, we studied the phase transitions and exchange bias of Ni(50-x)Mn(36)Sn(14)Tx (T = Pd, Pt; x = 0, 1, 2, 3) alloys. An intermartensitic transition (IMT), not observed in Ni50Mn36Sn14 alloy, was induced by the proper application of negative chemical pressure by Pd(Pt) doping in Ni50-xMn36Sn14Tx (T = Pd, Pt) alloys. IMT weakened and was suppressed with the increase of applied field; it also disappeared with further increase of Pd(Pt) content (x = 3 for Pd and x = 2 for Pt). Another striking result is that exchange bias effect, ascribed to the percolating ferromagnetic domains coexisting with spin glass phase, is notably enhanced by nonmagnetic Pd(Pt) addition. The increase of unidirectional anisotropy by the addition of Pd(Pt) impurities with strong spin-orbit coupling was explained by Dzyaloshinsky-Moriya interactions in spin glass phase.

引用

页数：8

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