Journal article · Preprint article
Magnetic-field-induced nonlocal effects on the vortex interactions in twin-free YBa2Cu3O7
Swiss Federal Institute of Technology Lausanne1
University of Birmingham2
Max Planck Institute3
Paul Scherrer Institute4
Nano-Microstructures in Materials, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark5
Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark6
Risø National Laboratory for Sustainable Energy, Technical University of Denmark7
Institut Max von Laue-Paul Langevin8
Bayerische Akademie der Wissenschaften9
The vortex lattice (VL) in the high-kappa superconductor YBa2Cu3O7, at 2 K and with the magnetic field parallel to the crystal c axis, undergoes a sequence of transitions between different structures as a function of applied magnetic field. However, from structural studies alone, it is not possible to determine precisely the system anisotropy that governs the transitions between different structures.
To address this question, here we report new small-angle neutron scattering measurements of both the VL structure at higher temperatures and the field and temperature dependence of the VL form factor. Our measurements demonstrate how the influence of anisotropy on the VL, which in theory can be parameterized as nonlocal corrections, becomes progressively important with increasing magnetic field, and suppressed by increasing the temperature toward Tc.
The data indicate that nonlocality due to different anisotropies plays an important role in determining the VL properties.
| Language: | English |
|---|---|
| Year: | 2011 |
| ISSN: | 1550235x , 10980121 and 01631829 |
| Types: | Journal article and Preprint article |
| DOI: | 10.1103/PhysRevB.84.104519 |
