Magnetocaloric effect of GdCo2-xAlx compounds

作者：Gu, Zhengfei; Zhou, Bo^*; Li, Junqin; Ao, Weiqin; Cheng, Gang; Zhao, Hacheng

来源：Solid State Communications, 2007, 141(10): 548-550.

DOI：10.1016/j.ssc.2006.12.026

• laves-phase structure
• magnetocaloric
• Curie temperature
• magnetic entropy

The structure, magnetic property and magnetocaloric effect of GdCo2-xAlx (x = 0, 0.06, 0.12, 0.18, 0.24, 0.4) compounds have been investigated by X-ray diffraction (XRD) and magnetic measurement techniques. The experimental results show that the GdCo2-xAlx (x >= 0.4) compounds are single phase with a Laves-phase MgCu2-type structure. The Curie temperature T-c initially increases, and then decreases with increasing Al content. The maximum value of T-c 418 K, is reached for the compound with x = 0.06. The magnetic entropy change, which is determined from the temperature and field dependence of the magnetization by the Maxwell relation, decreases almost linearly with increasing Al content.

• 出版日期2007-3
• 单位桂林电子科技大学; 深圳大学