Field-induced martensitic transformation in new ferromagnetic shape memory compound Mn1.07Co0.92Ge
Field-induced martensitic transformation in new ferromagnetic shape memory compound Mn1.07Co0.92Ge
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DOI：
10.1143/jjap.43.8036
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发表时间：
2004-12-01
期刊：
影响因子：
--
通讯作者：
Watanabe, K
中科院分区：
文献类型：
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作者：
Koyama, K;Sakai, M;Watanabe, K
用磁化强度测量和粉末X射线衍射测量研究了铁磁性化合物Mn1.07Co0.92Ge在13T以下的磁化强度和5T以下的粉末X射线衍射谱，测得居里温度为275K。在室温下，该化合物具有六方Ni2In型结构，在ms=210K时无扩散地转变为具有滞后的正交TiNiSi型结构。晶胞体积在ms时膨胀了5.3%，磁矩增加了24%，并伴随着马氏体相变。此外，我们还首次证实了磁场诱导了Mn1.07Co0.92Ge在MS附近的结构转变。
The structural transformation of a ferromagnetic Mn1.07CO0.92Ge compound was studied by magnetization measurement in magnetic fields up to 13 T and powder X-ray diffraction measurement in fields up to 5 T. The Curie temperature is determined to be 275 K. At room temperature, the compound has a hexagonal Ni2In-type structure, and it transforms diffusionlessly into an orthorhombic TiNiSi-type structure at Ms = 210 K with hysteresis. The cell volume expands by 5.3% and the magnetic moment increases by 24% at Ms, accompanied with this martensitic structural transformation. In addition, we confirmed for the first time that magnetic field induces the structural transformation in Mn1.07Co0.92Ge at the vicinity of Ms.