Magnetism of Superconducting UPt3
G. Haran, G. A. Gehring
Abstract
The phase diagram of superconducting U\!Pt3 in pressure-temperature plane, together with the neutron scattering data is studied within a two component superconducting order parameter scenario. In order to give a qualitative explanation to the experimental data a set of two linearly independent antiferromagnetic moments which emerge appropriately at the temperature TN 10· Tc and Tm Tc and couple to superconductivity is proposed. Several constraints on the fourth order coefficients in the Ginzburg-Landau free energy are obtained.
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