Magnetocaloric effect in a Fe-Mn-Ga alloy

被引：2

作者：

Kastil, J. ^{[1
]}

Kamarad, J. ^{[1
]}

Kolomiets, A. V. ^{[2
,3
]}

Konoplyuk, S. M. ^{[4
]}

Kozlova, L. E. ^{[4
]}

Perekos, A. O. ^{[5
]}

Dzevin, E. ^{[5
]}

机构：

[1] Czech Acad Sci, Inst Phys, Prague 18200, Czech Republic

[2] Lviv Polytech Natl Univ, Dept Phys, UA-79005 Lvov, Ukraine

[3] Charles Univ Prague, Dept Condensed Matter Phys, Prague, Czech Republic

[4] Inst Magnetism NASU & MESU, UA-03142 Kiev, Ukraine

[5] NASU, GV Kurdyumov Inst Met Phys, UA-03142 Kiev, Ukraine

来源：

JOURNAL OF APPLIED PHYSICS | 2024年 / 135卷 / 24期

关键词：

MARTENSITIC-TRANSFORMATION; ELECTRONIC-STRUCTURE; MAGNETIC-PROPERTIES; TEMPERATURE;

D O I：

10.1063/5.0210643

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A magnetocaloric effect (MCE) due to adiabatic change of temperature was directly measured in an Fe47.1Mn26.1Ga26.8 alloy undergoing martensitic transformation. Its values in the high-temperature region were positive, while in the temperature range below temperatures of martensitic transformation, the adiabatic change of temperature in the magnetic field was negative. The x-ray diffraction analysis revealed the presence of a Heusler L2(1) (B2) phase and a gamma-phase in the Fe47.1Mn26.1Ga26.8 alloy above temperature of martensitic transformation. The features of field-dependent magnetization and temperature variation in MCE indicate the occurrence of ferromagnetic-to-antiferromagnetic transition in the gamma-phase, which is responsible for the observed inverse magnetocaloric effect.

引用

页数：6

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