Abstract
An anomalous peak in the magnetoresistance was observed in granular ultrathin films of DyBa2Cu3O7-x whose low-temperature behaviors span the zero-field superconductor-insulator transition. The magnitude of this peak increased with the weakening of the superconductivity of the films. Frustration effects in a Josephson coupled superconducting array are not sufficient to account for the peak. Instead, this unusual behavior may result from an interaction of the carriers with antiferromagnetically ordered Cu2+ ions on the copper-oxygen sheets, providing a crucial link between superconductivity and magnetism.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 11619-11622 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 47 |
| Issue number | 17 |
| DOIs | |
| State | Published - 1993 |