Study ofa〈001〉 anda〈110〉 screw dislocations viewed end‐on in crystal Ba(NO3)2by birefringence topography

Autor:	Nai-Ben Ming, Zhen‐Hua Wu, Hai‐Wen Wang, Ming Qi, Chuan‐Zhen Ge
Rok vydání:	1995
Předmět:	Crystal Crystallography chemistry.chemical_compound Birefringence Materials science Condensed matter physics chemistry Extinction (optical mineralogy) General Physics and Astronomy Barium nitrate Dislocation Burgers vector
Zdroj:	Journal of Applied Physics. 78:111-116
ISSN:	1089-7550 0021-8979
Popis:	The screw dislocations with Burgers vector a〈001〉 and a〈110〉 in Ba(NO3)2 crystals have been studied by birefringence topography. In combination with the results obtained previously [C.‐Z. Ge, N.‐B. Ming, K. Tsukamoto, K. Maiwa, and I. Sunagawa, J. Appl. Phys. 69, 7556 (1991); C.‐Z. Ge, H.‐W. Wang, and N.‐B. Ming, ibid. 74, 139 (1993)], it has been shown that not only a〈111〉, but also a〈110〉 screw dislocations viewed end‐on are visible; however, a〈100〉 screw dislocation viewed end‐on are always invisible in barium nitrate crystals. The intensity distributions and extinction rules of birefringence images of a〈110〉 screw dislocation viewed end‐on are determined both experimentally and theoretically.
Databáze:	OpenAIRE
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