NiTi记忆合金薄膜中马氏体相变对电导噪声的影响
Signature of Martensite transformation on conductivity noise in thin films of NiTi shape memory alloys
摘要：
本文测量了直流磁控溅射镍钛记忆合金薄膜电阻随时间的缓慢波动或噪声。即使在平衡状态下，噪声是几个数量级大于简单的扩散金属膜，并被发现是非单调的马氏体相变制度。从结构缺陷的动力学角度对结果进行了讨论，为提出一种新的基于噪声的马氏体相变表征方案奠定了基础。
英文摘要：
Slow time-dependent fluctuations, or noise, in the electrical resistance of dc magnetron sputtered thin films of Nickel Titanium shape memory alloys have been measured. Even in equilibrium, the noise was several orders of magnitude larger than that of simple diffusive metallic films, and was found to be non-monotonic around the martensitic transformation regime. The results are discussed in terms of dynamics of structural defects, which also lay foundation to a new noise-based characterization scheme of martensite transformation.
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