Relation of magnetic and structural factors in the course of phase transitions in MnAs-based alloys
Relation of magnetic and structural factors in the course of phase transitions in MnAs-based alloys
复制标题
MnAs基合金相变过程中磁性与结构因素的关系
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
B. Todris
中科院分区：
文献类型：
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作者：
S. Asadov;É. Zavadskii;V. Kamenev;E. Stefanovskiǐ;A. Sukstanskii;B. Todris
本文对砷化锰基合金在很宽的温度和压力范围内的磁性和结构相态进行了唯象分析。实验研究了从顺磁态和变磁态到铁磁态的独特一级相变。据发现，这些过渡表现出与磁致伸缩抑制成核时的顺磁相的不稳定边界是缺席的，从变磁状态的过渡是不对称的“禁止”的特征。该模型解释了锰砷化物基合金的相行为。该模型考虑了合金的磁性、结构和弹性性质之间的相互关系，以及真实的晶体中相变的具体特征。
A phenomenological analysis of the magnetic and structural phase states observed in the manganese arsenide-based alloys over a wide range of temperatures and pressures has been performed. The unique first-order phase transitions from the paramagnetic and metamagnetic states to the ferromagnetic state are studied experimentally. It is found that these transitions exhibit characteristic features associated with the magnetostriction suppression of nucleation when the lability boundary of the paramagnetic phase is absent and the transition from the metamagnetic state is not thermodynamically “forbidden.” The phase behavior of manganese arsenide-based alloys is interpreted within the proposed model. This model accounts for the interrelation of the magnetic, structural, and elastic properties of alloys and also the specific features of phase transformations in real crystals.