Ho_0.3Tb_0.3Dy_0.4Fe_1.93化合物的结构、磁性和磁致伸缩  

Structure, Magnetism and Magnetostriction of Ho0.3Tb0.3Dy0.4Fe1.93 Compound

作　　者：王志业 时阳光[1] 

机构地区：[1]南京航空航天大学物理学院,江苏 南京

出　　处：《应用物理》2025年第1期64-70,共7页Applied Physics

基　　金：本研究受到了南京航空航天大学研究生科研与实践创新(xexjh20242115)项目的资助。

摘　　要：本文采用真空电弧熔炼法制备了Ho0.3Tb0.3Dy0.4Fe1.93Laves相化合物,研究了其结构、磁性和磁致伸缩性能。X射线衍射实验和能谱分析结果表明,Ho0.3Tb0.3Dy0.4Fe1.93化合物呈现单一的Laves相。根据初始交流磁化率曲线确定Ho0.3Tb0.3Dy0.4Fe1.93化合物有两个自旋重取向温度TSR1和TSR2,分别对应易磁化方向从到和从到的转变。差示扫描量热法测量出Ho0.3Tb0.3Dy0.4Fe1.93化合物居里温度为643 K。在室温下,Ho0.3Tb0.3Dy0.4Fe1.93化合物在3 kOe和10 kOe磁场下,磁致伸缩(λ||-λ⊥)分别为810 ppm和1332 ppm。变温磁致伸缩研究表明,在3 kOe和10 kOe磁场下,磁致伸缩λ3k ≥ 500 ppm和λ10k ≥ 1000 ppm的温度跨度分别为155 K和280 K。这表明Ho0.3Tb0.3Dy0.4Fe1.9化合物具有宽温域磁致伸缩性能。In this paper, Ho0.3Tb0.3Dy0.4Fe1.93 Laves phase compounds were prepared by vacuum arc melting method, and their structural, magnetic, and magnetostrictive properties were investigated. The results of X-ray diffraction experiments and energy spectroscopic analyses showed that the Ho0.3Tb0.3Dy0.4Fe1.93 compounds exhibit a single Laves phase. The Ho0.3Tb0.3Dy0.4Fe1.93 compound was determined to have two spin reorientation temperatures, TSR1 and TSR2, based on the Initial AC magnetic susceptibility, which corresponds to transitions from to and from to in the easy magnetic directionin, respectively. Differential scanning calorimetry measured the Curie temperature of the Ho0.3Tb0.3Dy0.4Fe1.93 compound to be 643 K. At room temperature, the magnetostriction (λ||-λ⊥) of the Ho0.3Tb0.3Dy0.4Fe1.93 compounds is 810 ppm and 1332 ppm for magnetic fields of 3 kOe and 10 kOe, respectively. Variable-temperature magnetostriction studies have shown that, for magnetic fields of 3 kOe and 10 kOe, the magnetostriction λ3k ≥ 500 ppm and λ15k ≥ 1000 ppm for temperature spans of 155 K and 280 K, respectively. This suggests that the Ho0.3Tb0.3Dy0.4Fe1.93 compounds have wide temperature domain magnetostrictive proper

关 键 词：LAVES相 易磁化方向 磁致伸缩 

分 类 号：TG1[金属学及工艺—金属学]