Abstract
A peak in the temperature dependence of the resistance of ultrathin, granular DyBa2Cu3O7-δ films has been found near the Néel temperature TN of the Dy3+ sublattice which orders as a 2D Ising antiferromagnet. The shift of the position of the peak to lower temperatures with increasing magnetic field is consistent with it being a signature of TN. These observations are attributed to the suppression of intergranular Josephson coupling by pair breaking, resulting from enhanced intragranular spin-disorder scattering of quasiparticles near the transition.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2752-2755 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 73 |
| Issue number | 20 |
| DOIs | |
| State | Published - 1994 |