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Ferromagnetic resonance of gadolinium doped calcium vanadium garnets
The ferromagnetic resonance (FMR) line shapes of Gd-substituted calcium vanadium garnets Y1.6−zCa1.4GdzFe4V0.4Zr0.6O12 (0.8⩽z⩽1.4) have been studied as the function of the Gd content. The samples had been synthesized by two different routes, with porosities varying from 0.23% to 8.9%. The FMR linewi...
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Published in: | Journal of applied physics 1997-02, Vol.81 (4), p.1863-1867 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The ferromagnetic resonance (FMR) line shapes of Gd-substituted calcium vanadium garnets Y1.6−zCa1.4GdzFe4V0.4Zr0.6O12 (0.8⩽z⩽1.4) have been studied as the function of the Gd content. The samples had been synthesized by two different routes, with porosities varying from 0.23% to 8.9%. The FMR linewidth, ΔH, in low porosity samples is small (15–20 Oe) and becomes seven to eight times higher in high porosity samples. The linewidth can be explained on the basis of Schloemann’s theory of anisotropy and porosity broadening in polycrystalline materials. The line shape is Lorentzian for low porosity and Gaussian for high porosity samples. This variation of the FMR line shape with porosity is explained on the basis of the stochastic theory. |
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ISSN: | 0021-8979 1089-7550 |
DOI: | 10.1063/1.364015 |