Abstract
We have studied YBa2Cu3O7-x ceramic samples during current cycling at 77 K using an acoustic emission method. We have observed the acoustic emission impulses at a narrow region current value of ±0.5 A. These impulses are reasoned to be the flux-line motion penetration into the samples by the magnetic self-field. Based on an experimental current value and the size of the sample, this H1 self-field value has been calculated to be 104 Oe. It is shown that the flux-line pinning process takes place most intensively in the narrow surface layer of a material.
| Original language | English |
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| Pages (from-to) | 1081-1082 |
| Number of pages | 2 |
| Journal | Superconductor Science and Technology |
| Volume | 15 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 2002 |