Structural and magnetic properties of epitaxial Ni2MnGa thin films

被引：11

作者：

Eichhorn, Tobias ^{[1
]}

Jakob, Gerhard ^{[1
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

来源：

FERROMAGNETIC SHAPE MEMORY ALLOYS II | 2010年 / 635卷

关键词：

Ni(2)MnGa; epitaxial thin films; free-standing; martensitic transformation; 7M structure; SINGLE-CRYSTALS;

D O I：

10.4028/www.scientific.net/MSF.635.155

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the preparation and investigation of epitaxial thin films of the magnetic shape memory alloy Ni(2)MnGa. For samples close to the stoichiometric composition we find that the phase transformation temperature is affected by the crystallographic orientation. Changes in the crystal structure due to the transformation are observed using temperature-dependent X-ray diffraction. Films with higher manganese content are in the martensitic state at room temperature. Those samples on Al(2)O(3)(11-20) reveal the 7-layered orthorhombic structure that allows strains up to 10 %. To avoid blocking of magnetostrictive effects by the substrate, free-standing films are prepared using water-soluble NaCl(100) single crystals as substrate.

引用

页码：155 / 160

页数：6

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