Effect of Yttrium on Microstructure and Magnetocaloric Properties in La1−xYxFe11.5Si1.5 Compounds

Applied Sciences

卷:8

He Zhou¹  Chang Liu¹  Jianing Xue¹  Yi Long¹  Yuanyuan Wu¹ 

[1] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;

关键词: NaZn₁₃-type crystal structure;    phase composition;    hysteresis loss;    magnetocaloric effect;   

DOI  :  10.3390/app8112198

来源: DOAJ

【 摘 要 】

The effects of Y on the phase composition and magnetocaloric effect in La_1−xY_xFe_11.5Si_1.5 compounds were studied. Y₂Fe₁₇-type phase and α-Fe phase appear in the annealed La_1−xY_xFe_11.5Si_1.5 compounds when x ≥ 0.07 due to small solid solubility of Y in NaZn₁₃ phase. Y₂Fe₁₇ phase obstructs the formation of the 1:13 phase, leading to the decrease of magnetic entropy changes. But for x < 0.1, La_1−xY_xFe_11.5Si_1.5 compounds exhibit high magnetic entropy changes and low hysteresis loss compared with that of LaFe_11.5Si_1.5. Consequently, the La_1−xY_xFe_11.5Si_1.5 compounds (x < 0.1) are useful to realize large magnetocaloric effect with smaller hysteresis loss.

【 授权许可】

Unknown