Spin fluctuations in the heavy fermin superconductor UPd(2)Al(3) studied by neutron inelastic scattering
It was discovered that there are two contributions to the dynamic response in UPd(2)Al(3). The first one is a heavily damped spin-wave, which has been observed previously. It shows no appreciable change on warming through T(c), but softens and becomes overdamped as T approaches T(N). The second one is a quasielastic-like component that exists in the antiferromagnetically ordered state and is strongly localized around the ordered wavevector. As a function of temperature this component exhibits a minimum at the superconducting transition temperature T(c) and increases strongly below T(c). Its width in the momentum space at T = 0.5 K corresponds to the correlation length of approximately 50 angstroms, which is close to the superconducting coherence length of approximately 85 angstroms.
Bibliographic Reference: Article: Journal of the Physical Society of Japan
Record Number: 199710796 / Last updated on: 1997-07-02
Original language: en
Available languages: en