Influence of a magnetic field on the antiferromagnetic order in UPt_3
arXiv:cond-mat/9606146 · doi:10.1103/PhysRevB.54.R6873
Abstract
A neutron diffraction experiment was performed to investigate the effect of a magnetic field on the antiferromagnetic order in the heavy fermion superconductor UPt_3. Our results show that a field in the basal plane of up to 3.2 Tesla, higher than H_c2(0), has no effect: it can neither select a domain nor rotate the moment. This has a direct impact on current theories for the superconducting phase diagram based on a coupling to the magnetic order.
7 pages, RevTeX, 3 postscript figures, submitted to Phys. Rev. B