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

作　　者：Feng Lu Shuo Xu Li-hua Wang 

机构地区：[1]Institute of Fisheries Engineering,Chinese Academy of Fishery Sciences,Beijing 100141,China

出　　处：《Rare Metals》2022年第1期232-239,共8页稀有金属（英文版）

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

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 temperature.The 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 direction.Saturated 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 GPa.The results suggest that the pressure-induced magnetic phase transition of Nd2Fe14B occurs under 1.15 GPa at room temperature.

关 键 词：MAGNETIZATION Curie temperature Molecular field theory Nd_(2)Fe_(14)B 

分 类 号：TQ133.3[化学工程—无机化工]