Anisotropic magnetic fluctuations in the ferromagnetic superconductor UCoGe studied by angle-resolved ^{59}Co NMR

Abstract

We have carried out direction-dependent ^{59}Co NMR experiments on a single crystal sample of the ferromagnetic superconductor UCoGe in order to study the magnetic properties in the normal state. The Knight shift and nuclear spin-lattice relaxation rate measurements provide microscopic evidence that both static and dynamic susceptibilities are ferromagnetic with strong Ising anisotropy. We discuss that superconductivity induced by these magnetic fluctuations prefers spin-triplet pairing state.

4 pages, 4 figures

References in corpus (4)

• 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
• Absence of Meissner State and Robust Ferromagnetism in the Superconducting State of UCoGe: Possible Evidence of Spontaneous Vortex State

Cited by in corpus (16)

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• 125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2
• High-field moment polarization in the ferromagnetic superconductor UCoGe
• Inhomogeneous Superconducting State Probed by ${}^{125}$Te NMR on UTe$_2
• Relationship between Ferromagnetic Criticality and the Enhancement of Superconductivity Induced by Transverse Magnetic Fields in UCoGe
• Low-temperature Magnetic Fluctuations Investigated by ${}^{125}$Te-NMR on the Uranium-based Superconductor UTe${}_2$
• Spin-triplet superconductivity in the paramagnetic UCoGe under pressure studied by ${}^{59}$Co NMR
• Enhancement of superconductivity by pressure-induced critical ferromagnetic fluctuations in UCoGe
• Pairing interaction in superconducting UCoGe tunable by magnetic field
• Angular variation of the magnetoresistance of the superconducting ferromagnet UCoGe
• Absence of the Pauli-Paramagnetic Limit in a Superconducting U${}_6$Co
• Superconductivity at the Pressure-Induced Ferromagnetic Critical Region in UCoGe
• Local aging effects in PuB${}_4$: Growing inhomogeneity and slow dynamics of local-field fluctuations probed by ${}^{239}$Pu NMR
• Evolution of magnetic fluctuations through the Fe-induced paramagnetic to ferromagnetic transition in Cr${}_2$B
• Nuclear spin-lattice relaxation time in UCoGe