The effect of Fe/Al ratio on the thermal stability and magnetocaloric effect of Gd55FexAl45-x (x = 15–35) glassy ribbons
The effect of Fe/Al ratio on the thermal stability and magnetocaloric effect of Gd55FexAl45-x (x = 15–35) glassy ribbons
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DOI：
10.1063/1.3677780
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发表时间：
2012-03
影响因子：
3.2
通讯作者：
F. Yuan;Qian Li;B. Shen
中科院分区：
文献类型：
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作者：
F. Yuan;Qian Li;B. Shen
研究了 Fe/Al 比对 Gd55FexAl45−x (x = 15–35) 玻璃带的热性能、磁热效应和制冷能力 (RC) 的影响。随着Fe/Al比的增加，最大磁熵变(−ΔSm)位于2.92～5.01 J·kg−1·K−1范围内，−ΔSm峰值温度(Tp)、居里温度(Tc)以及−ΔSm半高宽(δTFWHM)均逐渐增大。当 x = 20 时，获得了 868 J kg−1 的最大 RC，这使得 Gd55FexAl45−x (x = 15–35) 玻璃带成为磁制冷材料的有吸引力的候选者。此外，随着Fe/Al比的增加，玻璃化转变现象趋于消失；这可能归因于一些微晶的形成。
The effect of Fe/Al ratio on the thermal properties, magnetocaloric effect, and refrigeration capacity (RC) of Gd55FexAl45−x (x = 15–35) glassy ribbons has been investigated. With Fe/Al ratio increasing, the maximum magnetic entropy changes (−ΔSm) are located in the range of 2.92 to 5.01 J · kg−1 · K−1, and the temperature at the peak values of −ΔSm (Tp), the Curie temperature (Tc), as well as the full width at half maximum of the −ΔSm (δTFWHM), all increase gradually. The maximum RC of 868 J kg−1 has been obtained for x = 20, which makes the Gd55FexAl45−x (x = 15–35) glassy ribbons attractive candidates for magnetic refrigeration materials. Furthermore, the glass transition phenomenon tends to disappear with as the Fe/Al ratio increases; this could be attributed to the formation of some crystallites.