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Optical Floating Zone Crystal Growth of Rare-Earth Tantalates RE_8Ta_2O_(17) (RE = Gd, Y, and Lu)
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| 【文章作者】Yueshen ZHOU;Dongsheng YUAN;Kiyoshi SHIMAMURA |
| 【文章摘要】 The bulk crystal growth of rare-earth tantalates RE_8Ta_2O_(17) (RE = Gd, Y, and Lu) was first achieved using the optical floating zone method. The crystals are colorlessness and exhibit a high transparency with an absorption edge at -265 nm. They are characterized in fluorite-type structure Fm-3m, and their compositions were found shifted from the nominal RE/Ta ratio of one, being smaller as the ionic radius of RE increases. Under light excitation of 230 nm, all the RE_8Ta_2O_(17) samples emit at -280 nm originating from Ta-0 charge transfer. However, undoped RE_8Ta_2O_(17) series only emit a weak luminescence due to the strong self-absorption of their UV emissions. K\Floating zone technique;;Rare-Earth Tantalates;;RE_8Ta_2O_(17);;Crystal |
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【卷】【ISSUE】【ISSUEID】
【文章期份】2024
【发布日期】2025/5/13 10:07:43
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