用真空高频磁悬浮炉制备了Gd3Al2,Gd2.9Mn0.1Al2,Gd2.8Mn0.2Al2,Gd2.7Mn0.3Al2四种合金.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,Gd2.9Mn0.1Al2,Gd2.8Mn0.2Al2的最大绝对温变分别为2K,1.5K和1.3K;随Mn含量的增加,居里温度Tc提高.
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] | Tegus O;Bruck E;Buschow J .Transition-metal-based magnetic refrigeranta for room-temperature applications[J].Nature,2002,415:150-152. |
[3] | Pecharsky VK;Gschneidner KA .Giant magnetocaloric effect in Gd-5(Si2Ge2)[J].Physical review letters,1997(23):4494-4497. |
[4] | 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. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%