High-field moment polarization in the ferromagnetic superconductor UCoGe

Abstract

We report magnetization and magnetoresistivity measurements on the isostructural ferromagnetic superconductors UCoGe and URhGe in magnetic fields up to 60 T and temperatures from 1.5 to 80 K. At low-temperature, a moment polarization in UCoGe in a field ${\mu }_0\mathbf{H}\parallel \mathbf{b}$ of around 50 T leads to well-defined anomalies in both magnetization and magnetoresistivity. These anomalies vanish in temperatures higher than 30-40 K, where maxima in the magnetic susceptibility and the field-induced variation of the magnetoresistivity are found. A comparison is made between UCoGe and URhGe, where a moment reorientation in a magnetic field ${\mu }_0\mathbf{H}\parallel \mathbf{b}$ of 12 T leads to field-induced reentrant superconductivity.

4 pages, 4 figures

References in corpus (5)

• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Unusual upper critical field of the ferromagnetic superconductor UCoGe
• Antiferromagnetic criticality at a heavy-fermion quantum phase transition
• Anisotropic magnetic fluctuations in the ferromagnetic superconductor UCoGe studied by angle-resolved ^{59}Co NMR
• High-Field Fermi Surface Properties in the Low Carrier Heavy Fermion Compound URu2Si2

Cited by in corpus (19)

• Unconventional Superconductivity in Heavy Fermion UTe2
• Review of U-based Ferromagnetic Superconductors: Comparison between UGe2, URhGe, and UCoGe
• Unconventional Superconductivity in UTe2
• Metamagnetic Transition in Heavy Fermion Superconductor UTe2
• Magnetic-Field-Induced Phenomena in the Paramagnetic Superconductor UTe${}_2$
• Comparison of two superconducting phases induced by a magnetic field in UTe2
• Field-Induced Superconductivity near the Superconducting Critical Pressure in UTe2
• Lifshitz Transitions in the Ferromagnetic Superconductor UCoGe
• Assessment of the U and Co magnetic moments in UCoGe by X-ray magnetic circular dichroism
• Non-unitary triplet superconductivity tuned by field-controlled magnetization --URhGe, UCoGe and UTe${}_2$--
• Relationship between Ferromagnetic Criticality and the Enhancement of Superconductivity Induced by Transverse Magnetic Fields in UCoGe
• Fermi Surface Instabilities in Ferromagnetic Superconductor URhGe
• Pairing interaction in superconducting UCoGe tunable by magnetic field
• Metamagnetic phase transition in ferromagnetic superconductor URhGe
• Unveiling the double-peak structure of quantum oscillations in the specific heat
• Angular variation of the magnetoresistance of the superconducting ferromagnet UCoGe
• Consecutive magnetic phase diagram of UCoGe-URhGe-UIrGe system
• Electron-beam Floating-zone Refined UCoGe
• Magnetoelastic coupling at the field-induced transition in EuAl${}_{12}$O${}_{19}$