Tuning the Ground State and Its Relationship to Zero-Field-Cooled Exchange Bias in NiMnSnAl Alloys

被引：4

作者：

Lu, N. L. ^{[1
,2
]}

Li, Y. ^{[2
,3
]}

Wang, H. B. ^{[1
,2
]}

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

Zhang, C. L. ^{[4
]}

Fang, Y. ^{[2
]}

Zhang, L. ^{[2
]}

Qian, B. ^{[2
]}

Jiang, X. F. ^{[2
]}

机构：

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

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

[3] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China

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

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2019年 / 32卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Heusler alloy; Ground state; Spin glass; Exchange bias; SPIN-GLASS;

D O I：

10.1007/s10948-019-5069-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The crystal structure, phase transitions, and exchange bias (EB) in Al-doped Ni50Mn36Sn14-xAlx Heusler alloys were investigated. With the increase of Al content, the cell volume decreases gradually, and the martensitic transformation temperature shifts to a higher temperature. Due to the positive "chemical pressure" by Al substitution, the antiferromagnetic interaction strengthens, leading to the decrease of magnetization and the ground state evolution from "reentrant" spin glass to spin glass. Zero-field-cooled EB is triggered in samples exhibiting spin-glass ground state. These results suggest a viable way to design Ni-Mn-Z-based alloys showing zero-field-cooled EB by tuning the exchange interactions and ground state via lattice modulation.

引用

页码：3243 / 3249

页数：7

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