Large reversible magnetocaloric effect in HoTiO3 single crystal
Large reversible magnetocaloric effect in HoTiO3 single crystal
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DOI：
10.1063/1.3653838
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发表时间：
2011-10
影响因子：
3.2
通讯作者：
Y. Su;Y. Sui;J. G. Cheng;X. J. Wang;Y. Wang;W. Liu;X. Liu
中科院分区：
文献类型：
--
作者：
Y. Su;Y. Sui;J. G. Cheng;X. J. Wang;Y. Wang;W. Liu;X. Liu
在钙钛矿型HoTiO_3单晶中观察到了大的磁热效应，并在TC = 53 K时发生了二级磁相变。在磁场变化为2 T和5 T时，最大磁熵变分别为5.96和11.56 J kg−1 K−1，没有任何可检测到的热损耗和磁滞损耗。大的磁熵变是由于急剧的磁化跳变，与晶格参数的异常，只是在居里温度。如此大的可逆磁热效应使得钙钛矿HoTiO 3对于追求用于磁制冷的新材料具有吸引力。
Large magnetocaloric effect has been observed in perovskite-type HoTiO3 single crystal accompanied by a second-order magnetic phase transition at TC ≈ 53 K. The values of maximum magnetic entropy change are about 5.96 and 11.56 J kg−1 K−1 under the magnetic field change of 2 and 5 T, respectively, without any detectable thermal and magnetic hysteresis loss. The large magnetic entropy change is attributed to the sharp magnetization jump, related to anomalies of the lattice parameters just at the Curie temperature. Such a large reversible magnetocaloric effect makes the perovskite HoTiO3 attractive for pursuing new materials for magnetic refrigeration.