Low Temperature Physics: 34, 503 (2008); https://doi.org/10.1063/1.2957001 (5 pages)
Физика Низких Температур: Том 34, Выпуск 7 (Июль 2008), c. 639-644 ( к оглавлению , назад )
Dislocation description of twins in high-temperature superconductor YBa2Cu3O7-d
Physics Department, New York City College of Technology of the City University of New York, Brooklyn, NY, 11201, USA
Received January 11, 2008
The thin twins theory consistently applied to the dislocation description of twins in the high-temperature superconductor YBa2Cu3O7-d (YBCO). Quantitative analysis of the twin shape shows an agreement with theoretical consideration and gives new method to evaluate the twin boundary energy gtw. Friction stress Sfr acting on a twinning dislocation is also determined. The formation of a twin and twin microstructures are analyzed. The principles of microstructure design by twinning in YBCO crystals for enhanced Jc at high magnetic fields are discussed.
PACS: 74.72.Bk Y-based cuprates;
Ключевые слова: twin boundaries, dislocations, flux pinning.