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摘要
A series of pure polycrystalline M-type hexagonal ferrite with the formula BaCo(0.5)xZn(0.5)x TixFe12-2xO19 (x = 0.0, 0.4, 0.8, 1.2, 1.6, 2.0) has been synthesized and studied by X-ray diffraction and Mossbauer spectroscopy. With increasing substitution the Mossbauer spectra change from magnetically ordered ( x = 0) towards magnetically ordered with strong line broadening ( x = 0.4 to 1.6) to nonmagnetic ( x = 2.0), due to decreasing of Curie temperatures. Differential line broadening and relative area of components indicates that for small values of x, a substitution occurs preferentially in 4f(1) and 4f(2) sites indirectly affecting Fe in the 12k site.
- 出版日期2004-9
