| Автор | Pratap Raychaudhuri |
| Дата выпуска | 1996-06-01 |
| dc.description | We have studied the virgin curve and hysteresis of radio-frequency magnetoabsorption in ) and BSCCO () samples at 77 K in a magnetic field up to a value of 2 kOe. The hysteresis of YBCO - Ag is in good agreement with the prediction of the two-level critical state model. However, in the case of BSCCO the agreement is there only when the maximum field does not exceed 67.5 Oe for a frequency of 1.5 MHz. For higher fields the results resemble those of the one-level critical state model. This is due to the fact that at fields greater than 67.5 Oe the superconducting grain boundaries become normal. The cross-over point shifts to 55 Oe when the frequency is increased to 12 MHz. A qualitative explanation of this shift is given on the basis of the disordered model. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Radio-frequency magnetoabsorption in YBCO - Ag and BSCCO superconductors: the cross-over between two-level and one-level critical state models |
| Тип | paper |
| DOI | 10.1088/0953-2048/9/6/002 |
| Electronic ISSN | 1361-6668 |
| Print ISSN | 0953-2048 |
| Журнал | Superconductor Science and Technology |
| Том | 9 |
| Первая страница | 447 |
| Последняя страница | 452 |
| Аффилиация | Pratap Raychaudhuri; Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur, India |
| Выпуск | 6 |
