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PrNi2的磁和磁热性能研究

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黄逸佳, 张国营, 胡风, 夏往所, 刘海顺. 2014: PrNi2的磁和磁热性能研究, 物理学报, null(22): 227501. doi: 10.7498/aps.63.227501
引用本文: 黄逸佳, 张国营, 胡风, 夏往所, 刘海顺. 2014: PrNi2的磁和磁热性能研究, 物理学报, null(22): 227501. doi: 10.7498/aps.63.227501
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Huang Yi-Jia, Zhang Guo-Ying, Hu Feng, Xia Wang-Suo, Liu Hai-Shun. 2014: Investigation on the magnetic and magneto caloric prop erties of PrNi2, Acta Physica Sinica, null(22): 227501. doi: 10.7498/aps.63.227501
Citation: Huang Yi-Jia, Zhang Guo-Ying, Hu Feng, Xia Wang-Suo, Liu Hai-Shun. 2014: Investigation on the magnetic and magneto caloric prop erties of PrNi2, Acta Physica Sinica, null(22): 227501. doi: 10.7498/aps.63.227501
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PrNi2的磁和磁热性能研究

  • 中国矿业大学理学院物理系,徐州,221008

Investigation on the magnetic and magneto caloric prop erties of PrNi2

  • 摘要: 在一些磁性材料内，磁性离子间交换作用和磁性离子的自旋涨落对材料磁性有影响.本文根据磁比热实验值确定了晶场参数后，利用包含自旋涨落的交换作用有效场Hm = n0(1+γT +βeωT )M ，计算了PrNi2晶体晶场能级的Zeeman劈裂.在温度为3.8 K 6 T 630 K范围内，计算了该晶体多晶磁矩随外磁场的变化，以及外磁场H =5000 Oe时磁化率倒数随温度的变化，计算结果和实验值符合较好.当外磁场在0-50000 Oe时，计算的该晶体的磁熵变与已有文献的理论结果相似.计算结果说明，提出的包含自旋涨落的交换作用有效场不仅适合亚铁磁性晶体，而且也适合顺磁性晶体.
    Abstract: The magnetic properties of some magnetic materials are influenced by the exchange interaction between magnetic ions and the spin fluctuations of magnetic ions. By use of the exchange interaction-effective field including the spin fluctuations of magnetic ions Hm=n0(1+γT+βeωT )M, the Zeeman splitting of crystal field energy levels of Pr3+ ions in PrNi2 and the variation of the magnetic moments with the applied field in a temperature range of 3.8 K 6 T 6 30 K are calculated. The thermal variation of the reciprocal susceptibility of Pr3+ ions is calculated as well for the applied magnetic field H =5000 Oe. The calculated results are in good agreement with the experimental data. The magnetic entropy changes are obtained theoretically in a magnetic field range of 0
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  • 刊出日期:  2014-11-30

PrNi2的磁和磁热性能研究

  • 中国矿业大学理学院物理系,徐州,221008

摘要: 在一些磁性材料内，磁性离子间交换作用和磁性离子的自旋涨落对材料磁性有影响.本文根据磁比热实验值确定了晶场参数后，利用包含自旋涨落的交换作用有效场Hm = n0(1+γT +βeωT )M ，计算了PrNi2晶体晶场能级的Zeeman劈裂.在温度为3.8 K 6 T 630 K范围内，计算了该晶体多晶磁矩随外磁场的变化，以及外磁场H =5000 Oe时磁化率倒数随温度的变化，计算结果和实验值符合较好.当外磁场在0-50000 Oe时，计算的该晶体的磁熵变与已有文献的理论结果相似.计算结果说明，提出的包含自旋涨落的交换作用有效场不仅适合亚铁磁性晶体，而且也适合顺磁性晶体.

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