Magnetic and magnetocaloric properties of martensitic Ni2Mn1.4Sn0.6 Heusler alloy

被引：48

作者：

Chernenko, Volodymyr A. ^{[1
,2
]}

Barandiaran, Jose M. ^{[1
]}

Rodriguez Fernandez, Jesus ^{[3
]}

Rojas, Daniel P. ^{[3
]}

Gutierrez, Jon ^{[1
]}

Lazpita, Patricia ^{[1
]}

Orue, Inaki ^{[4
]}

机构：

[1] Univ Basque Country, Dept Elect & Elect, E-48080 Bilbao, Spain

[2] Basque Fdn Sci, Bilbao 48011, Spain

[3] Univ Cantabria, CITIMAC, Fac Ciencias, E-39005 Santander, Spain

[4] Vicerrectorado Inv UPV EHU, SGiker, Leioa 48940, Spain

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 21期

关键词：

Magnetocaloric effect; Specific heat; Martensitic transformation; Bias exchange; Ni-Mn-Sn alloy; SHAPE-MEMORY ALLOYS; NI-MN-SN; TEMPERATURE; HEAT;

D O I：

10.1016/j.jmmm.2012.02.080

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolutions of magnetic properties at low temperatures and the influence of magnetic field on the temperature dependence of specific heat in martensitic Ni2Mn1.4Sn0.6 Heusler alloy are studied. The frequency-dependent blocking temperature and considerable exchange bias below it are measured in the martensitic phase. From the analysis of the specific heat curves under magnetic field, a large inverse magnetocaloric effect manifested as the magnetic field induced rise of isothermal magnetic entropy and/or magnetic field induced adiabatic temperature decrease in the vicinity of the reverse magnetostructural transformation and a significant value of the conventional magnetocaloric effect at the Curie temperature are obtained. The Debye temperature and electronic coefficient equal to Theta(D)=310 +/- 2 K and gamma = 16.6 +/- 0.3 mJ/K(2)mol, respectively, do not depend on the magnetic field. (C) 2012 Elsevier BY. All rights reserved.

引用

页码：3519 / 3523

页数：5

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