THE INDUCED UNIAXIAL MAGNETIC ANISOTROPY OF FERRITES CONTAINING Co²⁺ AND Ni²⁺

Abstract

摘要 本文分别计算了含Co2+与含Ni2+铁氧体的感生单轴各向异性。前者从Iida提出的物理机构出发,考虑了阳离子缺位对Co2+能级和波函数的影响;后者从Schnettler-Gyorgy所提出的物理机构出发,考虑了四面体位置中Ni2+的Jahn-Teller效应,求出了它的能级和波函数。由此算得此二类物质的感生单轴各向异性和实验结果符合得较好。另外,还解释了θu和θα产生偏离的原因。 Abstract In this paper the induced uniaxial magnetic anisotropy of ferrites containing Co2+ and Ni2+ is discussed. For the former case, it starts from the mechanism proposed by Iida, taking into account the influence of cation vacancy upon the energy levels and wave functions of Co2+; while for the latter case, it is based upon the mechanism introduced by Schnettler-Gyorgy, considering the Jahn-Teller effect of Ni2+ in tetrahedral sites and deriving its energy levels and wave functions. Then the induced uniaxial magnetic anisotropy of both materials is calculated and may be comparable with the experimental results. The mechanism of the deviation of θu with θα is also discussed. 作者及机构信息 蔡鲁戈 1. 南京大学物理系 Authors and contacts TSAI LU-KE 1. 南京大学物理系 参考文献 [1] 施引文献