Thermal and magnetic hysteresis associated with martensitic and magnetic phase transformations in Ni52Mn25In16Co7 Heusler alloy

被引：8

作者：

Madiligama, A. S. B. ^{[1
]}

Ari-Gur, P. ^{[2
]}

Ren, Y. ^{[3
]}

Koledov, V. V. ^{[4
]}

Dilmieva, E. T. ^{[4
]}

Kamantsev, A. P. ^{[4
]}

Mashirov, A. V. ^{[4
]}

Shavrov, V. G. ^{[4
]}

Gonzalez-Legarreta, L. ^{[5
]}

Grande, B. H. ^{[5
]}

机构：

[1] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA

[2] Western Michigan Univ, Dept Mech & Aerosp Engn, Kalamazoo, MI 49008 USA

[3] Argonne Natl Lab, 9700 S Cass Ave,433-D 008, Argonne, IL 60439 USA

[4] RAS, Kotelnikov Inst Radioengn & Elect, Moscow 125009, Russia

[5] Univ Oviedo, Dept Phys, Calvo Sotelo S-N, Oviedo 33007, Spain

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2017年 / 442卷

基金：

美国国家科学基金会; 俄罗斯科学基金会;

关键词：

Giant magnetocaloric effect; Heusler alloys; Martensitic phase transformations; Magnetic phase transformations; Thermal hysteresis; INDUCED SHAPE RECOVERY; REFRIGERATION; TEMPERATURE;

D O I：

10.1016/j.jmmm.2017.06.080

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ni-Mn-In-Co Heusler alloys demonstrate promising magnetocaloric performance for use as refrigerants in magnetic cooling systems with the goal of replacing the lower efficiency, eco-adverse fluid-compression technology. The largest change in entropy occurs when the applied magnetic field causes a merged structural and magnetic transformation and the associated entropy changes of the two transformations works constructively. In this study, magnetic and crystalline phase transformations were each treated separately and the effects of the application of magnetic field on thermal hystereses associated with both structural and magnetic transformations of the Ni52Mn25In16Co7 were studied. From the analysis of synchrotron diffraction data and thermomagnetic measurements, it was revealed that the alloy undergoes both structural (from cubic austenite to a mixture of 7M & 5M modulated martensite) and magnetic (ferromagnetic to a low-magnetization phase) phase transformations. Thermal hysteresis is associated with both transformations, and the variation of the thermal hystereses of the magnetic and structural transformations with applied magnetic field is significantly different. Because of the differences between the hystereses loops of the two transformations, they merge only upon heating under a certain magnetic field. Published by Elsevier B.V.

引用

页码：25 / 35

页数：11

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