Angular variation of the magnetoresistance of the superconducting ferromagnet UCoGe

作者：Bay T V^*; Nikitin A M; Naka T; McCollam A; Huang Y K; de Visser A

来源：Physical Review B, 2014, 89(21): 214512.

DOI：10.1103/PhysRevB.89.214512

We report a magnetoresistance study of the superconducting ferromagnet UCoGe. The data, taken on single-crystalline samples, show a pronounced structure at B* = 8.5 T for a field applied along the ordered moment m(0). Angle-dependent measurements reveal that this field-induced phenomenon has an uniaxial anisotropy. Magnetoresistance measurements under pressure show a rapid increase of B* to 12.8 T at 1.0 GPa. We discuss B* in terms of a field-induced polarization change. Upper critical field measurements corroborate the unusual S-shaped B-c2(T) curve for a field along the b axis of the orthorhombic unit cell.

• 出版日期2014-6-25