Effect of lattice contraction on martensitic transformation and magnetocaloric effect in Ge doped Ni-Mn-Sn alloys

被引：60
作者：
Han, Z. D. [1 ,2 ]
Wang, D. H. [1 ]
Zhang, C. L. [1 ]
Xuan, H. C. [1 ]
Zhang, J. R. [1 ]
Gu, B. X. [1 ]
Du, Y. W. [1 ]
机构：
[1] Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[2] Changshu Inst Technol, Dept Phys, Jiangsu Lab Adv Funct Mat, Changshu 215500, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2009年 / 157卷 / 1-3期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Ferromagnetic shape memory alloys; Martensitic transformation; Magnetocaloric effect; INDUCED SHAPE RECOVERY; NI2MNGA; TEMPERATURE; PRESSURE;
D O I：
10.1016/j.mseb.2008.12.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The composition dependences of the structure, martensitic transformation and the magnetocaloric effect in Ni43Mn46Sn11-xGex (x = 0, 1, 2) ferromagnetic shape memory alloys are investigated. These samples all have L2(1) Heusler type structure at room temperature. With the increase of Ge content, the cell volume decreases, and the martensitic transformation temperatures increase rapidly. Large low-field magnetic entropy changes around the martensitic transformation temperatures are observed. Compared to the conventional way to control martensitic transformation temperatures by the adjustment of valence electron concentration, our results indicate that the adjustment of cell volume provides an alternative way to tailor the martensitic transformation and the magnetocaloric effect in ferromagnetic shape memory alloys. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：40 / 43
页数：4
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