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Magnetic and magneto-thermal properties of ferrimagnetic alloys (Er1−x Y x )(Co0.84Fe0.16)2 and their dependence on the orientations of resultant and sublattice magnetizations
Journal of Physics: Condensed Matter ( IF 2.3 ) Pub Date : 2021-05-28 , DOI: 10.1088/1361-648x/abfc17
M S Anikin 1 , E N Tarasov 1 , N V Kudrevatykh 1 , D S Neznakhin 1 , M A Semkin 1, 2 , N V Selezneva 1 , S V Andreev 1 , A V Zinin 1
Affiliation  

In this paper structure, magnetic and magneto-thermal properties: magnetic entropy change (ΔS m) and refrigeration capacity (q) of Er1–x Y x (Co0.84Fe0.16)2 alloys (x = 0, 0.2, 0.4, 0.6, 0.8, 1) in magnetic fields up to 90 kOe in a temperature range of 5–360K are investigated. An analysis of temperature dependences of magnetization (σ) and high-field susceptibility (χ hf) showed that in these compounds, three different ferri- and a one ferromagnetic structures are consequently realized. Concentration dependences of magnetic moment at 5K (μ f.u.), Curie temperature (T C), residual magnetization (σ r) and coercivity (H c) have been shown to have an extreme at intermediate Y concentration. The character of temperature dependence of magnetic entropy change (ΔS m(T)) depends on the composition and originates from the type of magnetic structure of the compound and the mutual orientation of R- and 3d- element sublattices magnetization with respect to the resulting one. In compounds with x = 0.6 and x = 0.8 temperature regions with different signs of ΔS m are observed, reflecting the change of dominating R- or 3d- sublattice in the resulting magnetization.



中文翻译:

亚铁磁性合金 (Er 1− x Y x )(Co 0.84 Fe 0.16 ) 2 的磁性和磁热性能及其对合成和亚晶格磁化方向的依赖性

本文结构中,磁和磁-热性能:磁熵变(Δ小号 )和制冷能力(q)铒的1- X ý X(钴0.840.162种合金(X = 0,0.2,0.4, 0.6, 0.8, 1) 在 5-360K 温度范围内高达 90 kOe 的磁场中进行了研究。对磁化强度 ( σ ) 和高场磁化率 ( χ hf )的温度依赖性的分析表明,在这些化合物中,因此实现了三种不同的亚铁磁结构和一种铁磁结构。5K 时磁矩的浓度依赖性 ( μ f.u. ),居里温度(Ť Ç),剩余磁化强度(σ - [R )和矫顽力(H ^ C ^)已经显示出具有在中间体Y浓度的极端。磁熵变 (Δ S m ( T ))的温度依赖性特性取决于化合物的成分,源于化合物的磁结构类型以及 R 和 3d 元素亚晶格磁化的相互取向相对于所得一。在具有不同符号 Δ S m 的x = 0.6 和x = 0.8 温度区域的化合物中 观察到,反映了在所产生的磁化中占主导地位的 R 或 3d 亚晶格的变化。

更新日期:2021-05-28
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