Pressure-induced magnetic transition in Nd_(2)Fe_(14)B based on two-sublattice model

作     者：Feng Lu Shuo Xu Li-hua Wang Feng Lu;Shuo Xu;Li-hua Wang

作者机构：Institute of Fisheries EngineeringChinese Academy of Fishery SciencesBeijing 100141China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第1期

页      面：232-239页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：This study was financially supported by the National Natural Science Foundation of China(No.11072036) 

主　　题：Magnetization Curie temperature Molecular field theory Nd_(2)Fe_(14)B 

摘      要：To analyze the magnetic properties of Nd_(2)Fe_(14)B compound under high pressure,an improved two-sublattice molecular field model coupled with equivalent stress field was applied to study the effect of pressure on magnetization,magnetostriction coefficient,susceptibility and Curie *** calculation results show that the pressure has a stronger effect on the magnetization of Fe sublattice compared to that of Nd sublattice at varied temperatures when the external magnetic field is parallel to the alignment *** magnetization,initial susceptibility and magnetic moment of Nd_(2)Fe_(14)B compound are found to decrease gradually with pressure increasing,and the Curie temperature of Nd_(2)Fe_(14)B decreases to about 298 K under an applied pressure of 1.15 *** results suggest that the pressure-induced magnetic phase transition of Nd2Fe14B occurs under 1.15 GPa at room temperature.