| Autor: |
Shih-Yun Chen, In-Gann Chen, Chuan-Pu Liu, Ping-Chi Hsieh, Mow-Kuen Wu |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Applied Superconductivity; Jun2003 Part 3 of 3, Vol. 13 Issue 2, p3180, 4p, 7 Black and White Photographs, 1 Diagram, 1 Chart, 3 Graphs |
| Abstrakt: |
The distribution of dislocations at the interface between the Sm[sub 2]BaCuO[sub 5] particles (Sm211-particles) and SmBa[sub 2]Cu[sub 3]O[sub 7] (Sm123) matrix with different 211-particle size from µm to nm was measured. It is found that the density of dislocations varies with the different curvatures of the 211-particles. There is a higher density of dislocations around small-sized 211-particles, especially those with sharp corners, which act as pinning centers and thus enhance the J[sub c](H, T) values of the superconductors. A phenomenological model has been proposed to describe the relationship between the curvature of 211-particles, the dislocation density around 211/123 interface, as well as the J[sub c](H,T). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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