Magnetocaloric effect and magnetic phase diagram of Ni-Mn-Ga Heusler alloy in steady and pulsed magnetic fields

被引：34

作者：

Koshkid'ko, Yu. S. ^{[1
]}

Dilmieva, E. T. ^{[2
]}

Kamantsev, A. P. ^{[2
]}

Cwik, J. ^{[1
]}

Rogacki, K. ^{[1
]}

Mashirov, A. V. ^{[2
]}

Khovaylo, V. V. ^{[3
]}

Mejiad, C. Salazar ^{[4
]}

Zagrebin, M. A. ^{[5
,6
]}

Sokolovskiy, V. V. ^{[5
]}

Buchelnikov, V. D. ^{[5
]}

Ari-Gur, P. ^{[7
]}

Bhale, P. ^{[7
]}

Shavrov, V. G. ^{[2
]}

Koledov, V. V. ^{[2
,8
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland

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

[3] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia

[4] Helmholtz Zentrum Dresden Rossendorf, Hochfeld Magnetlabor Dresden HLD EMFL, D-01328 Dresden, Germany

[5] Chelyabinsk State Univ, Chelyabinsk 454001, Russia

[6] Natl Res Univ, South Ural State Univ, Chelyabinsk 454080, Russia

[7] Western Michigan Univ, Kalamazoo, MI 49008 USA

[8] Sirius Univ Sci & Technol, 1 Olymp Ave, Soci 354340, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 904卷

基金：

俄罗斯科学基金会;

关键词：

Heusler alloy; High magnetic fields; Magnetocaloric effect; Magnetostrutural phase transition; Ni-Mn-Ga; MARTENSITIC-TRANSFORMATION; MEMORY; TRANSITIONS; NI54MN21GA25;

D O I：

10.1016/j.jallcom.2022.164051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The work is devoted to the study of the phenomenon of irreversibility of the magnetocaloric effect (MCE) in the vicinity of the magnetostructural phase transition (PT) in Ni-Mn-Ga Heusler alloys. For this purpose, the MCE was studied by the direct method in stationary (up to 14 T) and pulsed magnetic fields (up to 50 T), and a magnetic phase diagram was constructed. Using a specially designed microscope, in-situ studies of the magnetostructural phase transition were carried out in magnetic fields of up to 14 T. Comparing the results of the MCE with those of the phase diagram, as well as in-situ studies, made it possible to determine the width of the irreversible MCE region. In-situ studies have shown, that the main reason of the occurrence of the irreversible MCE is the presence of the residual martensite formed as a result of the first magnetization of the sample. The results are discussed within the framework of Landau's phenomenological PT theory, which predicts the disappearance of thermal hysteresis under a field of 30 T. Within the framework of the same theory, a recommendation is made to reduce the value of the critical field and, as a result, the width of the hysteresis.(c) 2022 Elsevier B.V. All rights reserved.

引用

页数：11

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