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Ho0.3Tb0.3Dy0.4Fe1.93化合物的结构、磁性和磁致伸缩
Structure, Magnetism and Magnetostriction of Ho0.3Tb0.3Dy0.4Fe1.93 Compound

DOI: 10.12677/app.2025.151007, PP. 64-70

Keywords: Laves相，易磁化方向，磁致伸缩
Laves Phase, Easy Magnetic Direction, Magnetostriction

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Abstract:

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<111>到<100>和从<100>到<110>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 <111> to <100> and from <100> to <110> 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

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