用真空高频磁悬浮炉制备了Gd3Al2、Gd2.9Zn0.1Al2、Gd2.7Zn0.3Al2、Gd2.4Zn0.6Al2四种合金.用直接测量法测量了在1.5T磁场下这四种合金的磁热效应.结果表明,在1.5T磁场下,Gd3Al2、Gd2.9Zn0.1Al2、Gd2.7Zn0.3Al2、Gd2.4Zn0.6Al2的最大绝对温变分别为2.0K、1.4 K、1.1K和0.7K;当Zn含量为0.1时,居里温度为287K.
参考文献
[1] | Kuz'min M D;Tishin A M .Magnetocaloric.part I:an introduction to various aspects of theory and practice[J].Cryogenics,1992,32(06):545. |
[2] | Pecharsky VK;Gschneidner KA .Giant magnetocaloric effect in Gd-5(Si2Ge2)[J].Physical review letters,1997(23):4494-4497. |
[3] | Cheng ZH;Di NL;Li QQ;Kou ZQ;Luo Z;Ma X;Wang GJ;Hu FX;Shen BG .Mossbauer effect probe of field-induced magnetic phase transition in LaFe13-xSix intermetallic compounds[J].Applied physics letters,2004(10):1745-1747. |
[4] | Tegus O .Transition-metal-based magnetic refrigerant for room-temperature application[J].Nature,2002,415:150-152. |
[5] | 胡凤霞,沈保根,孙继荣,王光军,成昭华.LaFe11.2Co0.7Si1.1合金在室温区的巨大磁熵变[J].物理,2002(03):139-140. |
[6] | 王敦辉;荫津华 等.Gd3Al2-xGax合金的磁熵研究[J].物理学报,1999,12(zk):S117-S119. |
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