αFe磁化特征的唯象分析  

Phenomenological Analysis in Magnetization Characteristic of αFe

作　　者：李青云[1] 成泰民[1] 

机构地区：[1]沈阳化工大学数理系,辽宁沈阳110142

出　　处：《辽宁大学学报（自然科学版）》2011年第3期197-201,共5页Journal of Liaoning University：Natural Sciences Edition

基　　金：国家自然科学基金(10647138);辽宁省教育厅科学研究项目(20060667)

摘　　要：利用铁磁性分子场理论的基础上,通过引入热无序能、冷无序能、与自发磁化相关的有序能之间的竞争机制下,引入了有效分子场系数.利用考虑与温度相关的有效分子场系数λ(T)的分子场理论研究了αFe的磁化特征,得到了与实验相符的结论,解释了铁磁性物质的约化自发磁化强度与温度的关系,解释了C/χ-T曲线在磁相变温度附近向上弯曲的原因,解释了顺磁居里温度θP大于铁磁居里温度TC的实验结果,解释了铁磁性物质中的有序-无序竞争与宏观磁性的关系.This paper based on the ferromegnatic molecular field theory,through the introduction of the competitive mechanism between thermal disordered energy,cold disordered energy and the ordered energy which related to the spontaneous magnetization interactions to intrduce the effective molecular field coefficient.We used the molecular field theory of effective molecular field coefficientλ(T) which associated temperature to study the magnetization characteristic of and was consistent with the experimental findings.It explained the relation between the reduced spontaneous magnetization intensity and the temperature,the reason of C/χ-T curve upward in the vicinity of magnetic phase transition temperature,the experimental result of the paramagnetic Curie temperature(θp) higher than the Curie temperature of ferromagnetic material(Tc) and the relation between the order-disorder competition and the macroscopic magnetism.

关 键 词：约化自发磁化强度 磁化率 有效分子场系数 

分 类 号：O48[理学—固体物理]