Influence of grain refinement and induced crystal defects on the magnetic properties of Ni50Mn36Sn14 Heusler alloy

被引：26

作者：

Alves, A. L. ^{[1
]}

Passamani, E. C. ^{[1
]}

Nascimento, V. P. ^{[1
]}

Takeuchi, A. Y. ^{[1
]}

Larica, C. ^{[1
]}

机构：

[1] Univ Fed Espirito Santo, Dept Fis, BR-29075910 Vitoria, ES, Brazil

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2010年 / 43卷 / 34期

关键词：

MEMORY; DIFFRACTION; NI2MNGA; SEARCH; SN;

D O I：

10.1088/0022-3727/43/34/345001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of high energy ball milling on the structural, magnetic and magnetocaloric properties of Ni50Mn36Sn14 Heusler-type alloy has been studied. X-ray diffraction results have revealed a reduction in the crystalline grain size concomitantly with defect inclusions in the crystalline lattice, favouring a chemical disorder effect that transforms the L2(1)-B2-type disordered structure to a simple cubic B2-type structure for increasing milling time. From magnetometry and Mossbauer spectroscopy results, a decrease in the ferromagnetic exchange interaction contribution, an enhancement of the effective exchange bias field and a significant reduction in the magnetic entropy change of the milled alloy are observed.

引用

页数：9

共 32 条

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