Effect of gallium doping on the magnetocaloric effect of LaFe11.2Co0.7Si1.1
来源期刊：Rare Metals2008年第4期
论文作者：DENG Jianqiu a, CHEN Xiang b, and ZHUANG Yinghong b a Guangxi Key Laboratory for the Advance Materials and New Preparation Technology, Nanning , China b Key laboratory of the Ministry of Education of China for Nonferrous Metal Materials and New Processing Technology, Guangxi University, Nanning , China
文章页码：345 - 349
摘 要：The lattice parameter and magnetocaloric properties of three samples of LaFe11.2Co0.7Si1.1-xGax with x = 0, 0.03 and 0.05 have been investi-gated by X-ray powder diffraction and magnetization measurements. The lattice parameter increases slightly and the Curie temperature in-creases somewhat with increasing gallium content. However, a small amount of Ga doping into the sample decreases the magnetic entropy change of the sample. All the samples remain in the first-order magnetic phase transition. The most striking effect of the Ga doping is that the cooling capacity in the samples increases significantly. The maximum magnetic entropy change, -△SM, max, and the cooling capacity of the sample LaFe11.2Co0.7Si1.07Ga0.03 are 11.9 J·kg-1·K-1 and 254.8 J·kg-1, respectively.
摘要：The lattice parameter and magnetocaloric properties of three samples of LaFe11.2Co0.7Si1.1-xGax with x = 0, 0.03 and 0.05 have been investi-gated by X-ray powder diffraction and magnetization measurements. The lattice parameter increases slightly and the Curie temperature in-creases somewhat with increasing gallium content. However, a small amount of Ga doping into the sample decreases the magnetic entropy change of the sample. All the samples remain in the first-order magnetic phase transition. The most striking effect of the Ga doping is that the cooling capacity in the samples increases significantly. The maximum magnetic entropy change, -△SM, max, and the cooling capacity of the sample LaFe11.2Co0.7Si1.07Ga0.03 are 11.9 J·kg-1·K-1 and 254.8 J·kg-1, respectively.
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