Influence of Al Substitution on Magnetocaloric Effect in La0.8-XAlXCe0.2Fe11.4Si1.6 Compounds

Yi Hu; Shan Dong Li; Mei Mei Liu; Jian Peng Wu; Xin Le Cai; Jie Qiu; Jian Hua Lin

doi:10.4028/www.scientific.net/AMR.399-401.992

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 399-401Influence of Al Substitution on Magnetocaloric...

Influence of Al Substitution on Magnetocaloric Effect in La_0.8-XAl_XCe_0.2Fe_11.4Si_1.6 Compounds

Abstract:

The influence of Al doping on the magnetic properties and magnetic entropy changes (ΔS_M) of the La_0.8-xAl_xCe_0.2Fe_11.4Si_1.6 (x = 0-0.2) compounds have been investigated around their Curie temperature T_C. The incorporation of Al atoms is unfavorable for the formation of the NaZn₁₃-type phase, however, it increases the T_C by ~40 K, effectively decreases the magnetic hysteresis loss, and broadens the ΔS_M-T curve at expense of the (ΔS_M)_max of the compounds. It is also revealed that Al doping content of x = 0.06 is an important composition knee point where the doped Al start to occupy the site of Rare-earth elements, leading to a turning point for the lattice constant, T_C, and magnetic transition type.

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Advanced Materials Research (Volumes 399-401)

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992-996

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.399-401.992

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Online since:

November 2011

Authors:

Yi Hu, Shan Dong Li, Mei Mei Liu, Jian Peng Wu, Xin Le Cai, Jie Qiu, Jian Hua Lin

Keywords:

Magnetic Entropy Change, Magnetic Hysteresis, Magnetocaloric Effect, Non-Continuous Cooling Method, Thermal Lag

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