| 直拉法生长的GGG和YAG单晶体中螺型位错的双折射像 |
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| 引用本文： | 葛传珍,凌黎,王牧,牛钟明,闵乃本,冯端. 直拉法生长的GGG和YAG单晶体中螺型位错的双折射像[J]. 物理学报, 1986, 35(2): 188-195 |
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| 作者姓名： | 葛传珍 凌黎 王牧 牛钟明 闵乃本 冯端 |
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| 作者单位： | 南京大学固体物理研究所 |
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| 摘 要： | 在直拉法生长的GGG和YAG单晶体中,从实验上首次获得了沿位错线观察的(viewed end-on)螺型位错的双折射像,确立了沿位错线观察和垂直于位错线观察(viewed from the side)的双折射像间的一一对应关系,以及与蚀斑间的一一对应关系,并基于石榴石晶体弹-光性质的各向异性,给出了沿位错线观察的螺型位错双折射像的成像规律,得到了理论与实验一致的结果。关键词：
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| 收稿时间： | 1985-03-28 |
BIREFRINGENCE IMAGES OF SCREW DISLOCATIONS VIEWED END-ON IN GGG AND YAG CRYSTALS |
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| GE CHCAN-ZHEN,LING LI,WANG MU,NIU ZHOUNG-MIN,MING NAI-BEN and FENG DUAN. BIREFRINGENCE IMAGES OF SCREW DISLOCATIONS VIEWED END-ON IN GGG AND YAG CRYSTALS[J]. Acta Physica Sinica, 1986, 35(2): 188-195 |
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| Authors: | GE CHCAN-ZHEN LING LI WANG MU NIU ZHOUNG-MIN MING NAI-BEN FENG DUAN |
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| Abstract: | Birefringence images of screw dislocations in Gadolinium Gallium Garnet (GGG) and Yttrium Aluminum Garnet YAG) crystals are studied in detail. Birefringence images of screw dislocations viewed end-on were observed for the first tiane. The one-to-one correspondence between birefringence images of screw dislocations viewed end-on and that viewed from the side was demonstrated. The contour of equal intensity of birefringence image of screw dislocation viewed end-on in GGG and YAG crystals was derived by considering the photo-elastieal anisotropy of garnet, and the result yields good agreement Avith experimental observations. |
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