T. Petersen et al., MAGNETIC FLUCTUATIONS AND THE SUPERCONDUCTING TRANSITION IN THE HEAVY-FERMION MATERIAL UPD2AL3, Physica. B, Condensed matter, 199, 1994, pp. 151-153
Inelastic neutron scattering has been performed on single crystals of
the heavy-fermion superconductor UPd2Al3. The antiferromagnetically or
dered state is characterized by an acoustic spin wave mode with no gap
. The low-frequency magnitude excitations are unaffected by the transi
tion to a superconducting state despite coupling to the conduction ele
ctrons as evidenced by the significant damping.