Martensitic transformation and magnetocaloric properties of NiCoMnSn magnetic shape memory alloys

被引：15
作者：
Emre, Baris [1 ]
Yuce, Suheyla [2 ]
Bruno, Nickolaus M. [3 ,5 ]
Karaman, Ibrahim [3 ,4 ]
机构：
[1] Ankara Univ, Fac Engn, Dept Phys Engn, Ankara, Turkey
[2] Ondokuz Mayis Univ, Sci & Literature Fac, Dept Phys, TR-55139 Kurupelit, Samsun, Turkey
[3] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA
[4] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA
[5] South Dakota Sch Mines & Technol, Dept Mech Engn, Rapid City, SD 57701 USA
来源：
INTERMETALLICS | 2019年 / 106卷
基金：
美国国家科学基金会;
关键词：
Ferromagnetic shape memory alloy; Martensitic transformation; Magnetic properties; Magnetocaloric effect; CO;
D O I：
10.1016/j.intermet.2018.12.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report on the magnetic, magnetocaloric properties, and hysteresis of Ni45Co5Mn38Sn12 and Ni45Co5Mn38.5Sn11.5 Heusler polycrystalline alloys under several magnetic field values. Both alloys have a moderate magnetization difference ( approximate to 70 emu/gr) between austenite and martensite phase with a moderate thermal hysteresis ( approximate to 8 K) around the martensitic transition. Magnetic field dependent measurements reveal that the application of a magnetic field stabilizes the austenite phase, which has higher magnetization. Both alloys have substantial inverse magnetic entropy changes and adiabatic temperature changes. In addition, we investigate the accessibility of the calculated entropy change that is quantified by means of the minimum magnetic field required to start and to complete the magnetostructural phase transition.
引用
收藏
页码：65 / 70
页数：6
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