Magnetocaloric effect in Ni2(Mn,Cu)Ga0.84Al0.16 Heusler alloys

被引：8

作者：

Mendonca, A. A. ^{[1
]}

Ghivelder, L. ^{[1
]}

Jurado, J. F. ^{[1
,2
]}

Gomes, A. M. ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Fis, CP 68528, BR-21941972 Rio De Janeiro, Brazil

[2] Univ Nacl Colombia, Dept Fis & Quim, Lab Propiedades Term Dielect Compositos, Manizales AA127, Colombia

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2021年 / 531卷

关键词：

Heusler alloys; Magnetocaloric effect; Entropy change; FIELD-INDUCED STRAIN; GA; SN;

D O I：

10.1016/j.jmmm.2021.167965

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline Heusler compounds Ni2Mn0.75Cu0.25Ga0.84Al0.16, with a martensitic transition between ferromagnetic phases, and Ni2Mn0.70Cu0.30Ga0.84Al0.16, with a magnetostructural transformation, were investigated by magnetization and heat capacity measurements, both as a function of temperature and magnetic field. The compound Ni2Mn0.75Cu0.25Ga0.84Al0.16 presents a large magnetocaloric effect at a transition between magnetically aligned structures. In addition, Ni2Mn0.70Cu0.30Ga0.84Al0.16 shows very high entropy change at room temperature, although irreversible, under a magnetic field change 0?1 T. The magnetocaloric properties of the studied samples are compared with selected compounds in the literature.

引用

页数：6

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