DISLOCATION DISSOCIATION ON CLIMB PLANE IN TEXTURED YBa2Cu3O7-δ SUPERCONDUCTOR |
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引用本文: | 郑建国,李齐,冯端.DISLOCATION DISSOCIATION ON CLIMB PLANE IN TEXTURED YBa2Cu3O7-δ SUPERCONDUCTOR[J].物理学报(海外版),1993,2(1):35-41. |
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作者姓名: | 郑建国 李齐 冯端 |
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作者单位: | National Laborotory of Solid State Microstructures, Nanjing University, Nanjing 210008, China |
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基金项目: | Project supported by the National Center for Research & Development on Superconductivity of China and the National Natural Science Foundation of China. |
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摘 要: | Using high resolution electron microscopy, the structure of 100] tilt boundary with misorientation of 1.2° in YBa2Cu3O7-δ has been determined. The boundary is shown to consist of an array of partial dis-locations, These partials result from the dissociation of a perfect dislocation with a Burgers vector 0, 0, c] on its climb plane according to the reaction, b→b1+b2+b1+b2+b1+b2. Here b=00c], b1=O,b/2, c/6} (or a/2, 0, c/6] ). b2=0, -b/2. c/6] (or -a/2, 0, c/6] ). The spacing between the perfect dislocations satisfies the Read-Shockley formula. There exist no amorphous phases in the boundary region.
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收稿时间: | 1992-03-05 |
DISLOCATION DISSOCIATION ON CLIMB PLANE IN TEXTURED YBa2Cu3O7-$\delta$ SUPERCONDUCTOR |
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Institution: | National Laborotory of Solid State Microstructures, Nanjing University, Nanjing 210008, China |
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Abstract: | Using high resolution electron microscopy, the structure of 100] tilt boundary with misorientation of 1.2° in YBa2Cu3O7-$\delta$has been determined. The boundary is shown to consist of an array of partial dis-locations, These partials result from the dissociation of a perfect dislocation with a Burgers vector 0, 0, c] on its climb plane according to the reaction, b→b1+b2+b1+b2+b1+b2. Here b=00c], b1=O,b/2, c/6} (or a/2, 0, c/6] ). b2=0, -b/2. c/6] (or -a/2, 0, c/6] ). The spacing between the perfect dislocations satisfies the Read-Shockley formula. There exist no amorphous phases in the boundary region. |
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