Large magnetocaloric effect in melt-spun LaFe13-xSix -: art. no. 10M305
Large magnetocaloric effect in melt-spun LaFe13-xSix -: art. no. 10M305
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DOI：
10.1063/1.1847871
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发表时间：
2005-05-15
影响因子：
3.2
通讯作者：
Müller, KH
中科院分区：
文献类型：
--
作者：
Gutfleisch, O;Yan, A;Müller, KH
对LaFe11.8Si1.2熔融纺丝带进行极短时间退火（2 h/1050℃），在5 T、201 K条件下，得到了非常大的磁熵变化纵杆δ S断裂纵杆= 31 J/kg K。在此温度范围内，该值远高于块体LaFe11.44Si1.56。大竖杆δ S竖杆归因于居里温度T-C下的一阶热诱导转变，并且由于元素分布更加均匀而进一步增强。随着Si浓度的增加，由于一阶磁相变的减弱甚至消失，T-C增加，垂直杆AS下降。(c) 2005年美国物理研究所。
A very large value of magnetic entropy change vertical bar Delta S broken vertical bar = 31 J/kg K was obtained at 201 K under 5 T in LaFe11.8Si1.2 melt-spun ribbons subjected to a very short-time annealing (2 h/1050 degrees C). This value is much higher than that of a bulk LaFe11.44Si1.56 in this temperature range. The large vertical bar Delta S vertical bar is attributed to the first-order thermally induced transition at the Curie temperature T-C, and is enhanced even further due to a more homogenous element distribution. With increasing Si concentration, T-C is increased and vertical bar AS vertical bar is decreased due to a weakening or an even disappearance of the first-order magnetic phase transition. (c) 2005 American Institute of Physics.