斯通纳理论和 DSFT 中 3d 金属合金的磁性与电子结构之间的关系

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Physics of Metals and Metallography Pub Date : 2024-04-21 DOI:10.1134/s0031918x23602275

N. B. Melnikov, A. S. Gulenko, B. I. Reser

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引用次数: 0

摘要

摘要我们研究了磁性能与居里温度、平均磁矩和局部磁矩的关系：居里温度、平均磁矩和局部磁矩与晶格类型和每个原子的平均 d 电子数有关。我们用两种近似方法来考虑这个问题：在斯通纳均场理论中不考虑自旋波动，在动态自旋波动理论（DSFT）中考虑自旋波动。在动态自旋波动理论中，我们获得了有限温度下平均磁矩的斯莱特-保龄曲线。动态自旋波动理论的数值结果与实验结果在本质上是一致的：铁磁合金中的磁相图和磁矩对浓度的依赖性。

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Relation between Magnetism and Electronic Structure of 3d-Metal Alloys in the Stoner Theory and in the DSFT

Abstract

We study the dependence of magnetic properties: Curie temperature, mean and local magnetic moments—on the type of crystal lattice and average number of d electrons per atom. The problem is considered in two approximations: with spin fluctuations not taken into account, in the Stoner mean field theory, and with spin fluctuations taken into account, in the dynamic spin fluctuation theory (DSFT). In the DSFT, we obtain an analogue of the Slater–Pauling curve for the mean magnetic moment at finite temperatures. Numerical results in the DSFT are in qualitative agreement with experiment: with magnetic phase diagram and dependence of magnetic moment on concentration in ferromagnetic alloys.

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来源期刊

Physics of Metals and Metallography 工程技术-冶金工程

CiteScore

2.00

自引率

25.00%

发文量

108

审稿时长

3 months

期刊介绍： The Physics of Metals and Metallography (Fizika metallov i metallovedenie) was founded in 1955 by the USSR Academy of Sciences. Its scientific profile involves the theory of metals and metal alloys, their electrical and magnetic properties, as well as their structure, phase transformations, and principal mechanical properties. The journal also publishes scientific reviews and papers written by experts involved in fundamental, application, and technological studies. The annual volume of publications amounts to some 250 papers submitted from 100 leading national scientific institutions.