2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164010We have performed measurements of the temperature dependence of the magnetoresistance up to 9 T in bulk single crystals of UPt3 with the magnetic field along the b axis, the easy magnetization axis. We have confirmed previous results for transverse magnetoresistance with the current along the c axis, and report measurements of the longitudinal magnetoresistance with the current along the b axis. The presence of a linear term in both cases indicates broken orientational symmetry associated with magnetic order. With the current along the c axis the linear term appears near 5 K, increasing rapidly with decreasing temperature. For current along the b axis the linear contribution is negative.6 pages, 3 figures, submitted to Quantum Fluids and Solids Conference (QFS 2006)Strongly Correlated ElectronsSuperconductivitytext