Abstract
Precise magnetization measurements of YBa2Cu3O7- single crystals have found evidence for a bulk phase transition a few degrees below the superconducting critical temperature. The phase transition is indicated by a sudden drop of the lower critical field, Hc1(T), separating a full coherent state at low fields and temperatures, the Meissner state, from a region at higher temperatures where magnetic excitations are induced at H=0.
| Original language | English |
|---|---|
| Pages (from-to) | 13610-13613 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 43 |
| Issue number | 16 |
| DOIs | |
| State | Published - 1991 |