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Effect of Co substitution on magnetic properties and magnetic entropy changes in LaFe11.83Si0.94Al0.23 compounds |
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| Authors: | Shen Jun Li Yang-Xian Wang Fang Wang Guang-Jun and Zhang Shao-Ying |
| Institution: | School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China; School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China; State Key Laboratory of Magnetism, Institute of Physics and Centre of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; State Key Laboratory of Magnetism, Institute of Physics and Centre of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China |
| Abstract: | Effect of Co substitution on magnetic properties and magnetic entropy changes in LaFe_{11.83}Si_{0.94}Al_{0.23} compounds has been investigated by means of magnetization measurements. X-ray diffraction shows the prepared compounds to be single phase with the cubic NaZn_{13}-type structure. Substitution of Co for Fe leads to an increase of Curie temperature of the material. The magnetic entropy changes in LaFe_{11.83}Si_{0.94}Al_{0.23} and LaFe_{11.03}Co_{0.80}Si_{0.94}Al_{0.23} compounds are 21.8J/(kg·K) to 16.9J/(kg·K) under a magnetic field change of 0－5T at Curie temperature, respectively. Giant magnetic entropy changes are attributed to the higher magnetization and the rapid change in magnetization at Curie temperature. |
| Keywords: | LaFe_{11 03}Co_{0 80}Si_{0 94}Al_{0 23} compounds magnetic property magnetic entropy change |
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