| Summary: | 碩士 === 國立中央大學 === 機械工程研究所 === 93 === Yttrium iron garnet (YIG) exhibits a large Faraday Effect in the near-infrared region, thus it has been widely applied as a magneto-optical Faraday element. With the development in technology, new materials were investigated for replacing YIG since it’s not enough magnitude of Faraday rotation to satisfy a device desired. Much research on cerium-substituted YIG had been reported with respect to the greatly larger Faraday effect than other materials. Consequently, Ce:YIG material is a much more promising material for magneto-optical devices.
In this study, we found that the influence of the addition CeO2 on the growth of YIG single crystals fibrous by LHPG method. Based on the experimental results, the addition of CeO2 into YIG caused the variation of flow properties of the molten zone, such as Prandtl number, the temperature gradient of the solid-liquid interface and the strength of oscillatory thermocapillary flow. Therefore, we have to suitability vary pulling rate to grow good quality of Ce:YIG single crystal fibrous. We see that the more Ce-doped content in YIG single crystal fibrous, the slower the pulling rate.
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