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首页> 外文期刊>Physica, B. Condensed Matter >Specific heat and magnetic ordering of ErBi studied with crystal-field theory in the mean-field approach
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Specific heat and magnetic ordering of ErBi studied with crystal-field theory in the mean-field approach

机译：用平均场方法用晶体场理论研究ErBi的比热和磁有序

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摘要

The low-temperature specific heat of ErBi is evaluated quantitatively with crystal-field (CF) theory in the mean-field approach by using a set of crystal-field parameters (CFPs) proposed by previous authors. The calculated temperature dependence of the heat capacity exhibits a sharp peak at the magnetic-transition temperature, and shows good agreement with the experimental results over the whole temperature region. To further investigate the mechanism of the magnetic ordering of the material, we have calculated the spontaneous magnetization for the case that only the ground-state CF level is considered and also for the case that the two lowest CF levels are considered, to compare with the results obtained with the full set of CF states of the J = 15/2 multiplet. The results suggest that the two lowest CF levels play a dominant role in the magnetic ordering below T-N.
机译：通过使用先前作者提出的一组晶体场参数（CFP），以均场方法通过晶体场（CF）理论定量评估ErBi的低温比热。计算得出的热容的温度依赖性在磁转变温度处显示一个尖峰，并且在整个温度范围内与实验结果吻合良好。为了进一步研究材料的磁有序机制，我们计算了仅考虑基态CF值的情况以及考虑两个最低CF值的情况下的自发磁化强度，以便与用J = 15/2多重峰的完整CF状态集获得的结果。结果表明，最低的两个CF水平在T-N以下的磁有序中起主导作用。

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