采用三坩埚提拉法生长出高质量铽镓石榴石(Tb3Ga5O12,TGG)单晶,晶体尺寸为φ25 mm×40 mm.通过X射线衍射、双晶衍射分析讨论TGG单晶的晶体结构和单晶性,并采用He-Ne激光费尔德常数测试装置测定TGG单晶的费尔德常数.结果表明:采用三坩埚提拉法生长的TGG单晶具有＜111＞取向、强度高,双晶摇摆曲线半峰宽为17 s；晶体在632.8 nm处的费尔德常数为0.553 min/cm·Oe.
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