Giant magnetic-field-induced strain in NiMnGa seven-layered martensitic phase
Giant magnetic-field-induced strain in NiMnGa seven-layered martensitic phase
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DOI：
10.1063/1.1458075
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发表时间：
2002-03-11
影响因子：
4
通讯作者：
Ullakko, K
中科院分区：
文献类型：
--
作者：
Sozinov, A;Likhachev, AA;Ullakko, K
在室温下，在小于1T的磁场中，在NiMnGa正交七层马氏体相中观察到约9.5%的巨磁致应变。应变被证明是由磁场控制的孪晶界运动。根据X射线衍射数据的分析，该相的晶体结构接近正交晶系，在环境温度下具有晶格参数a=0.619 nm、B=0.580 nm和c=0.553 nm（在立方母相坐标中）。记录了沿（110）[1（1）over bar 0]（p）系统的七层洗牌型调制沿着。力学性能测试和磁各向异性性能测量的结果也报告。(C)2002年美国物理学会。
Giant magnetic-field-induced strain of about 9.5% was observed at ambient temperature in a magnetic field of less than 1 T in NiMnGa orthorhombic seven-layered martensitic phase. The strain proved to be caused by magnetic-field-controlled twin boundary motion. According to an analysis of x-ray diffraction data, the crystal structure of this phase is nearly orthorhombic, having lattice parameters a=0.619 nm, b=0.580 nm, and c=0.553 nm (in cubic parent phase coordinates) at ambient temperature. Seven-layer shuffling-type modulation along the (110)[1 (1) over bar0](p) system was recorded. The results of mechanical tests and magnetic anisotropy property measurements are also reported. (C) 2002 American Institute of Physics.