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

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:531

Article

Mendonca, A. A.¹  Ghivelder, L.¹  Jurado, J. F.^1,2  Gomes, A. M.¹ 

[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

关键词: Heusler alloys;    Magnetocaloric effect;    Entropy change;   

DOI  :  10.1016/j.jmmm.2021.167965

来源: Elsevier

【 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.

【 授权许可】

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