| Autor: |
W, Knafo, C, Meingast, K, Grube, S, Drobnik, P, Popovich, P, Schweiss, P, Adelmann, Th, Wolf, H, V Löhneysen |
| Rok vydání: |
2006 |
| Zdroj: |
Physical review letters. 99(13) |
| ISSN: |
0031-9007 |
| Popis: |
The phase diagram of the quasi-two-dimensional antiferromagnet BaNi(2)V(2)O(8) is studied by specific heat, thermal expansion, magnetostriction, and magnetization for magnetic fields applied perpendicular to c. At micro(o)H* approximately 1.5 T, a crossover to a high-field state, where T(N)(H) increases linearly, arises from a competition of intrinsic and field-induced in-plane anisotropies. The pressure dependences of T(N) and H* are interpreted using the picture of a pressure-induced in-plane anisotropy. Even at zero field and ambient pressure, in-plane anisotropy cannot be neglected, which implies deviations from pure Berezinskii-Kosterlitz-Thouless behavior. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
