Temperature Dependent Magnetic and Structural Properties of Ni-Mn-Ga Heusler Alloy Glass-Coated Microwires

被引：2
|
作者：
Shevyrtalov, S. [1 ,2 ]
Chichay, K. [1 ,2 ]
Ershov, P. [1 ,2 ]
Khovaylo, V. [3 ,4 ]
Zhukov, A. [5 ,6 ]
Zhukova, V. [5 ]
Rodionova, V. [1 ,2 ,3 ]
机构：
[1] Immanuel Kant Balt Fed Univ, Innovat Pk, Kaliningrad 236041, Russia
[2] Immanuel Kant Balt Fed Univ, Inst Phys & Technol, Kaliningrad 236041, Russia
[3] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia
[4] ITMO Univ, St Petersburg 197101, Russia
[5] SUPV EHU, Fac Quim, Dept Fis Mat, San Sebastian 20009, Spain
[6] Ikerbasque, Basque Fdn Sci, E-48011 Bilbao, Spain
来源：
ACTA PHYSICA POLONICA A | 2015年 / 127卷 / 02期
关键词：
D O I：
10.12693/APhysPolA.127.603
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on structural and magnetic properties of glass-coated microwires of Ni-Mn-Ga-based Heusler alloys. Structural characterization of the as-prepared microwires revealed that they have a cubic structure at room temperature. It is shown that magnetic properties of microwires can be tailored by heat treatment as well as by removing the glass coating. Specifically, annealing of the microwires has a marked influence of the Curie temperature T-C which increases significatly in the heat-treated samples. Release of internal stresses in the microwires by removing the glass coating causes magnetization and the Curie temperature to decrease. This allowed us to conclude that in the studied microwires the magnetostriction constant is positive and estimate the value of internal stresses as being roughly equal to 1.5 GPa.
引用
收藏
页码：603 / 605
页数：3
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