Magnetic structure of martensite in Ni-Mn-Ga-Co alloys

被引：2
|
作者：
Cesari, Eduard [1 ]
Segui, Concepcio [1 ]
Lazpita, Patricia [2 ]
机构：
[1] Univ Illes Balears, Fac Fis, Dept Elect & Elect, Crtra Valldemossa Km 7-5, Palma De Mallorca 07122, Spain
[2] Univ Basque Country, Fac Ciencia & Tecnol, Dept Elect & Elect, Leioa, Spain
来源：
FUNCTIONAL MATERIALS LETTERS | 2017年 / 10卷 / 01期
关键词：
Metamagnetic shape memory alloys; magnetostructural transformation; atomic order; ATOMIC ORDER; TRANSFORMATION;
D O I：
10.1142/S1793604717400094
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ni50-xCoxMn30Ga20 (x = 6-9) alloys undergo martensitic transformation between ferromagnetic (FM) austenite and weak-magnetic martensite. However, the type of magnetism of martensite remains unclear. In this work, the results of a detailed study of the magnetic state of martensite in a Ni43Co7Mn30Ga20 are shown. The evolution with post-quench ageing indicates that improvement of atomic order increases the FM contributions to the weak-magnetic martensite, major changes occurring as the austenite switches from paramagnetic (PM) to FM. The results are consistent with the presence of FM clusters inside a PM matrix.
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页数：5
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