Details

Autor(en) / Beteiligte

• Leishman, A W D
• Sokolova, A
• Bleuel, M
• Zhigadlo, N D
• Eskildsen, M R

Titel

Field angle dependent vortex lattice phase diagram in MgB2

Ist Teil von

• Physical review. B, 2021-03, Vol.103 (9), p.1

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2021

Quelle

American Physical Society

Beschreibungen/Notizen

• Using small-angle neutron scattering we have studied the superconducting vortex lattice (VL) phase diagram in MgB2 as the applied magnetic field is rotated away from the c axis and towards the basal plane. The field rotation gradually suppresses the intermediate VL phase which exists between end states aligned with two high-symmetry directions in the hexagonal basal plane for H∥c. Above a critical angle, the intermediate state disappears, and the previously continuous transition becomes discontinuous. The evolution towards the discontinuous transition can be parametrized by a vanishing twelvefold anisotropy term in the VL free energy.