Abstract

The heat capacity, thermal diffusivity, thermal conductivity, magnetization, and electrical resistance of the rapidly quenched Ni₅₀Mn₃₅Al₂Sn₁₃ alloy have been studied. Pronounced anomalies in the form of minima associated with magnetic and magnetostructural transformations have been observed on the temperature dependence of the thermal diffusivity. The behavior of thermal conductivity and thermal diffusivity indicates that the free path of heat carriers is limited by structural imperfections of the tape. The transition of the sample to the martensitic phase is accompanied by a sharp increase in electrical resistance, suggesting increasing the electron relaxation rate on structural distortions inherent in martensite. The magnitude of the magnetoresistive effect Δρ/ρ₀ in a field of 1.8 T near the martensitic transition reaches 40%. A temperature hysteresis, indicating the structural heterogeneity of the austenitic phase, was detected on the dependence of ρ(T) near T_C.

中文翻译：

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快速淬火的Ni 50 Mn 35 Al 2 Sn 13带样品的热，磁和磁传输性质

摘要

快速淬火的Ni ₅₀ Mn ₃₅ Al ₂ Sn ₁₃的热容量，热扩散系数，导热系数，磁化强度和电阻已经研究了合金。关于热扩散率的温度依赖性，已经观察到与磁性和磁结构转变有关的极小形式的明显异常。导热率和热扩散率的行为表明，载带的自由路径受到胶带结构缺陷的限制。样品到马氏体相的转变伴随着电阻的急剧增加，这表明由于马氏体固有的结构变形，电子弛豫速率增加了。的磁阻效应Δρ/ρ的大小₀在马氏体转变附近的1.8 T场中，碳含量达到40％。检测到温度滞后现象表明奥氏体相在结构上的异质性，这取决于在T _C附近ρ（T）的依赖性。