Angular variation of the magnetoresistance of the superconducting ferromagnet UCoGe

Abstract

We report a magnetoresistance study of the superconducting ferromagnet UCoGe. The data, taken on single-crystalline samples, show a pronounced structure at $B^{\ast }=8.5$~T for a field applied along the ordered moment $m_0$. Angle dependent measurements reveal this field-induced phenomenon has an uniaxial anisotropy. Magnetoresistance measurements under pressure show a rapid increase of $B^{\ast }$ to 12.8~T at 1.0~GPa. We discuss $B^{\ast }$ 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.

6 pages, 5 figures; accepted for publication in Phys. Rev. B

References in corpus (6)

• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Unusual upper critical field of the ferromagnetic superconductor UCoGe
• Field Re-entrant Superconductivity Induced by the Enhancement of Effective Mass in URhGe
• Anisotropic magnetic fluctuations in the ferromagnetic superconductor UCoGe studied by angle-resolved ^{59}Co NMR
• High-field moment polarization in the ferromagnetic superconductor UCoGe
• Properties of Ferromagnetic Superconductors

Cited by in corpus (4)

• Lifshitz Transitions in the Ferromagnetic Superconductor UCoGe
• Assessment of the U and Co magnetic moments in UCoGe by X-ray magnetic circular dichroism
• Field-angle evolution of the superconducting and magnetic phases of UTe${}_2$ around the $b$ axis
• Electron-beam Floating-zone Refined UCoGe