Phase Transformation, Microstructure and Magnetocaloric Properties in Polycrystalline Bulk Ni50Mn50-zSnz Alloys

被引：13
|
作者：
Ingale, B. D. [1 ]
Kuo, Y. K. [1 ]
Ram, S. [2 ]
机构：
[1] Natl Dong Hwa Univ, Dept Phys, Hualien 97401, Taiwan
[2] Indian Inst Technol, Ctr Mat Sci, Kharagpur 721302, W Bengal, India
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2011年 / 47卷 / 10期
关键词：
Heusler alloys; magnetic field; magnetic susceptibility; magnetization; magnetocaloric; microstructure;
D O I：
10.1109/TMAG.2011.2152373
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The martensitic and magnetic transformations in bulk Ni50Mn50-zSnz (z = 11.5-15.0) Heusler alloys were investigated by differential scanning calorimetry measurement and the vibrating sample magnetometry technique and are described in correlation to the microstructure. It is established that increasing the Sn-content in this series leads to change the alloy microstructure very sensitively from a martensite phase (with distinct martensite strips) over z = 11.5-13.5 to the austenite phase as early as z = 15.0 at room temperature. The structural transition temperature has decreased from 411 K for z = 11.5 at% of the Sn content to a value as low as 196 K for z = 15.0 at% Sn content. An inverse magnetocaloric effect (MCE) has been observed with a Delta S-M value 2.5 Jkg(-1) K-1 at 273 K for z = 13.5 at % Sn-content.
引用
收藏
页码：3395 / 3398
页数：4
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