Abstract
We have carried out direction-dependent 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.
- Received 17 August 2010
DOI:https://doi.org/10.1103/PhysRevLett.105.206403
© 2010 The American Physical Society