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本文对钇-镱(Y-Yb)柘榴石型铁氧体系统Y3-xYbxFe3O12 (其中x=0,0.75,1.50,2.25和3.00)的磁性进行了研究。采用共同沉淀和氧气中烧结的方法制备样品,进行了X射线粉末照相的观测,测量了静态磁滞迴线,起始磁导率(500千赫),电阻率,鲍和磁化强度,居里点及分米波段磁谱。实验结果表明:整个系统都是单相的柘榴石型结构,所有样品都具有实际密度大(>90%理论密度)、电阻率高(109—1010欧姆·厘米)的特点。The yttrium-ytterbium (Y-Yb) garnet system Y3-xYbxFe3O12 was investigated at the compositions for which x=0, 0.75, 1.50, 2.25 and 3.00. The samples were prepared by the co-precipitation method and sintered 7 hours in oxygen atmosphere at 1350℃ or 1400℃. Lattice constants and theoretical densities were determined from X-ray diffraction data. It was found that the whole system consisted of a single phase with the garnet structure, and the lattice constant decreased linearly from 12.371? (Y3Fe5O12) to 12.297? (Yb3Fe5O12). The static hysteresis loop, the initial permeability at 500 Kc, the saturation magnetization between liquid-air temperature to the Curie point and the magnetic spectrum between 500 Mc and 3000 Mc were observed as a function of compositions. It was found that all the samples had high bulk densities ( > 90 % theoretical densities) and high resistivities (109—1010ohm-cm), and that the saturation magnetization Vs temperature curves had positive slopes at 10W temperature for x ≥ 1.50.
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