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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Near room temperature magnetic entropy changes in as-cast Gd_(100-x)Mn_x (x = 0, 5,10,15, and 20 at.%) alloys
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Near room temperature magnetic entropy changes in as-cast Gd_(100-x)Mn_x (x = 0, 5,10,15, and 20 at.%) alloys

机译:接近室温的铸造Gd_(100-x)Mn_x(x = 0、5、10、15和20 at。%)合金的磁熵变

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摘要

A series of Gd_(100-x)Mn_x (x = 0,5,10,15, and 20 at.%) alloys were prepared by arc-melting. The Curie temperature (T_c) associated with the ferromagnetic-paramagnetic transitions, derived from M-T curves, show decrease in T_c for as-cast alloys (~279 K) as compared to as-cast Gd (~292 K). No appreciable decrease in the |ΔS_M|_(max) values ~4.6 J/kgK (0-2T) and ~8.6J/kg K (0-5T) were observed upon alloying Gd with Mn up to x < 15 at.%. Refrigerant capacity (q) showed negligible variation ~195 J/kg (0-2 T) and ~450J/kg (0-5 T) with increasing Mn (up to x< 15 at.%) content.
机译:通过电弧熔化制备了一系列Gd_(100-x)Mn_x(x = 0、5、10、15和20 at。%)合金。由M-T曲线得出的与铁磁-顺磁转变相关的居里温度(T_c)与铸态Gd(〜292 K)相比,铸态合金(〜279 K)的T_c降低。在将Gd与Mn合金化至x <15 at。%时,未观察到|ΔS_M| _(max)值〜4.6 J / kgK(0-2T)和〜8.6J / kg K(0-5T)的可观降低。 。随着锰含量的增加(最多x <15 at。%),制冷剂容量(q)表现出的〜195 J / kg(0-2 T)和〜450J / kg(0-5 T)的变化可以忽略不计。

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