Relationship between Curie temperature and Brillouin function characteristics of NiCuZn ferrites
Relationship between Curie temperature and Brillouin function characteristics of NiCuZn ferrites
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DOI：
10.1063/1.4908609
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发表时间：
2015-02
影响因子：
3.2
通讯作者：
R. Guo;Zhong Yu;Yan Yang;Linglong Chen;K. Sun;Xiaona Jiang;Chuanjian Wu;Z. Lan
中科院分区：
文献类型：
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作者：
R. Guo;Zhong Yu;Yan Yang;Linglong Chen;K. Sun;Xiaona Jiang;Chuanjian Wu;Z. Lan
基于Neel的二子晶格共线模型，采用非线性拟合计算方法，研究了NiCuZn铁氧体居里温度Tc与布里渊函数温度特性的关系。根据尖晶石结构模型的四面体A位和八面体B位中不仅含有Fe 3+，而且含有其他多种磁性离子（Ni 2+和Cu 2+），计算了分子场系数ωaa、ωbb和ωab = ωba，并分别修正了亚铁磁性和顺磁性居里温度Tc的计算公式。分别研究了磁矩随温度T的变化（低于居里温度Tc）和顺磁磁化率的倒数1/χm随温度T的变化（超过居里温度Tc）。计算得到的铁磁性居里温度与实测值非常接近，且在锌含量t相同的情况下，顺磁性居里温度与实测值相差不大。
Based on Neel's two-sublattice collinear model, the relationship between Curie temperature Tc and temperature characteristics of Brillouin function for NiCuZn ferrites has been studied by nonlinear fitting calculation method. According to the tetrahedral A sites and the octahedral B sites of spinel structure model which do not only contain Fe3+ but also some other multiple magnetic ions (Ni2+and Cu2+), molecular-field coefficients ωaa, ωbb, and ωab = ωba have been calculated; furthermore, the ferrimagnetism and paramagnetism Curie temperature Tc calculation formula has been modified, respectively. The magnetic moment versus temperature T (below the Curie temperature Tc) and the reciprocal of paramagnetism magnetic susceptibility 1/χm versus temperature T (beyond the Curie temperature Tc) have been investigated, respectively. The values of the calculated ferrimagnetism Curie temperature are very close to the values of the testing Curie temperature, and with the same zinc content t, the values of paramagnet...