Magnetic properties in the normal state of spin-triplet superconductor Sr2RuO4 are discussed on the basis of Ru- and O-NMR and neutron-diffraction (ND) measurements reported so far. Besides strong incommensurate antiferromagnetic (IC-AFM) fluctuations probed by the ND measurements, it is shown that q-independent fluctuations are present over a wide temperature range up to 500 K from the comparison between NMR and ND results. From an anisotropy in the nuclear spin lattice relaxation rate 1/T1 at both the Ru and O sites, it was found that the IC-AFM fluctuations are anisotropic so that the out-of-plane component of low-frequency dynamical susceptibility, X″IC,out(q,ω) is by a factor of ∼3 larger than the in-plane one, X″IC,in(q,ω). These unique characters in magnetic fluctuations are implied to have some relevance for the occurrence of spin-triplet superconductivity.
|Number of pages
|Physical Review B - Condensed Matter and Materials Physics
|Published - Sep 1 2001
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics