Dependence of magnetocaloric properties of PrNi5 on exchange interaction-effective field

作者：Zhang, G. Y.^*; Hu, F.; Dong, X.; Xia, W. S.

来源：Journal of Alloys and Compounds, 2016, 671: 299-303.

DOI：10.1016/j.jallcom.2016.02.080

• PrNi5
• Exchange interaction-effective field
• Magnetic moment
• Magnetic entropy
• Magnetic entropy changes

Based on the law of approach to saturation and the experimental results of magnetic moments of PrNi5, the exchange interaction-effective field in PrNi5 is given under a strong magnetic field and at low temperature, which is shown as H-in = aH(e) + bH(e)(3/2) + cH(e)(2). By using the exchange interaction-effective field, the Zeeman Hamiltonian can be calculated directly without using the self-consistent method. Furthermore, the magnetic moment, the magnetic entropy and the magnetic entropy changes of PrNi5 are calculated in the ranges of 0 < H-e < 20T and 2 < T < 60K. The obtained results are in good agreement with the experimental data. The investigation indicates that the exchange interaction-effective field in PrNi5, under the strong magnetic field and at low temperature, is only a function of the applied field.

• 出版日期2016-6-25
• 单位中国矿业大学（北京）