Behavior of magnetic domains during structural transformations in Ni2MnGa ferromagnetic shape memory alloy
Behavior of magnetic domains during structural transformations in Ni2MnGa ferromagnetic shape memory alloy
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DOI：
10.1063/1.1624633
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发表时间：
2003-10
影响因子：
4
通讯作者：
H. Park;Y. Murakami;D. Shindo;V. Chernenko;T. Kanomata
中科院分区：
文献类型：
--
作者：
H. Park;Y. Murakami;D. Shindo;V. Chernenko;T. Kanomata
用Lorentz显微镜和电子全息术原位观察了Ni2MnGa Heusler合金从母相到中间相再到马氏体转变过程中磁畴结构的变化。母相和中间相均表现出特殊的条纹状磁畴，且磁化强度分布相似。与此相反，磁化分布显着修改的转变为四相马氏体。观察似乎表明，在母相中的磁化强度分布可以与短波晶格畸变相互作用，以产生中间相，通过磁弹性相互作用，导致在继承的原始磁化强度分布到中间相。
Change in the magnetic domain structure of Ni2MnGa Heusler alloy with the structural transformation from the parent phase to the intermediate phase and subsequent transformation to the martensite was studied by in situ observations using Lorentz microscopy and electron holography. Both the parent phase and the intermediate phase showed peculiar stripe magnetic domains, and the observed magnetization distribution was similar to each other. In contrast, the magnetization distribution was dramatically modified by the transformation to the tetragonal martensite. The observation appears to indicate that the magnetization distribution in the parent phase can interact with the short-wave lattice distortions to generate the intermediate phase, via the magnetoelastic interaction, resulting in the inheritance of the original magnetization distribution into the intermediate phase.