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Magnetocaloric Effects of Binary Rare Earth Nitrides

  • Yusuke Hirayama (a1), Takashi Nakagawa (a2), Takafumi Kusunose (a3) and Takao A. Yamamoto (a4)

Abstract

We synthesized Ho x Er1−x N (x =0.1, 0.3, 0.5, 0.7, 0.9) by the carbothermic reduction method. The magnetic entropy change, ΔS, which is an indicator of performance of magnetocaloric effect, MCE, was obtained from data sets of magnetization M (H, T) measured at various temperature, T, and magnetic field, H, through the Maxwell equations. The Thus obtained ΔS vs. T curves have peaks at temperatures depending on x in a range of 8–18 K. ΔS values of Ho x Er1−x N expressed in terms of J K−1 m−3 were higher than those of intermetallic compounds of rare earth and transition metals previously reported. These ΔS peak plots are along a convex curve, which may indicate an interaction between the two components.

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Magnetocaloric Effects of Binary Rare Earth Nitrides

  • Yusuke Hirayama (a1), Takashi Nakagawa (a2), Takafumi Kusunose (a3) and Takao A. Yamamoto (a4)

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