Giant magnetic coercivity in orthorhombic YNi4Si-type SmNi4Si compound
Giant magnetic coercivity in orthorhombic YNi4Si-type SmNi4Si compound
复制标题
正交晶系YNi4Si型SmNi4Si化合物的巨磁矫顽力
DOI:
10.1016/j.jssc.2015.07.012
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发表时间:
2015-10
影响因子:
3.3
通讯作者:
A. V. Morozkin
中科院分区:
文献类型:
--
作者:
Jinlei Yao;A. V. Morozkin
Magnetic properties, magnetocaloric effect and heat capacity of the YNi4Si-type SmNi4Si compound have been investigated. SmNi4Si exhibits ferromagnetic transition at 17 K. Below ~9 K, the magnetic isotherms of SmNi4Si show metamagnetic-like behavior with critical field of 20 kOe at 5 K. Heat capacity measurements of SmNi4Si show the electronic heat capacity coefficientγ=94 mJ/(mol K2), phonon coefficientβ=0.35 mJ/(mol K4) and Debye temperatureTD=310 K. The magnetocaloric effect of SmNi4Si is calculated in terms of isothermal magnetic entropy change which is obtained by the isothermal magnetization (ΔSmmagn) and heat capacity measurements (ΔSmheat). Both ΔSmmagnand ΔSmheatreach a maximum of –1.0 J/kg K at 17 K for a field change of 50 kOe and they show positive values for a field change of 20 kOe at ~9 K. Below 15 K, SmNi4Si shows large magnetic hysteresis with considerable remanence. At 5 K it exhibits giant coercive field of 58 kOe in an applied field of 90 kOe.
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