Fe and Co selective substitution in Ni2MnGa: Effect of magnetism on relative phase stability

被引：83

作者：

Soto-Parra, D. E. ^{[1
]}

Moya, X. ^{[1
]}

Manosa, L. ^{[1
]}

Planes, A. ^{[1
]}

Flores-Zuniga, H. ^{[2
]}

Alvarado-Hernandez, F. ^{[2
]}

Ochoa-Gamboa, R. A. ^{[2
]}

Matutes-Aquino, J. A. ^{[2
]}

Rios-Jara, D. ^{[3
]}

机构：

[1] Univ Barcelona, Fac Fis, Dept Estructura & Constituents Mat, E-08028 Barcelona, Catalonia, Spain

[2] Ctr Invest Mat Avanzados, Chihuahua 31109, Mexico

[3] Inst Potosino Invest Cient & Tecnol, San Luis Potosi 78216, Mexico

来源：

PHILOSOPHICAL MAGAZINE | 2010年 / 90卷 / 20期

关键词：

magnetic shape memory alloys; Ni2MnGa; phase transitions; phase diagrams; SHAPE-MEMORY ALLOYS; MN-GA ALLOYS; FIELD-INDUCED STRAIN; MARTENSITIC-TRANSFORMATION; HEUSLER ALLOYS; SINGLE-CRYSTALS; ENTROPY CHANGE; TRANSITION; TEMPERATURES; FERROMAGNETISM;

D O I：

10.1080/14786431003745393

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We studied the effect of selective substitution in Fe and Co 3d elements on the structural and magnetic phase transitions in the prototypical magnetic shape memory alloy Ni-Mn-Ga. We determined the phase diagram for each elemental doping substitution by means of calorimetry and ac susceptibility measurements. An effort was made to substitute each constituent element by the same amounts of doping and to study the role of parameters other than electronic concentration in controlling phase stability. Specifically, selective doping with atoms of similar atomic radii but different magnetic properties allowed us to investigate the role of magnetic interactions on the relative phase stability of the ternary compound. We determined the entropy change associated with the martensitic transition for each quaternary alloy to obtain further information on the effect of magnetism on the relative stability of the involved phases exhibited by these compounds.

引用

页码：2771 / 2792

页数：22

共 68 条

[1] Coexisting ferro- and antiferromagnetism in Ni2MnAl Heusler alloys [J].