Effect of Spin Reorientational Transition on Magnetoresistivity of Noncolinear Ferromagnet U3As4
K. Bakkera, P. Wiśniewskib, Z. Henkieb and J.J.M. Fransea
aUniversiteit van Amsterdam, Van der Waals-Zeeman Laboratorium, Valckenierstraat 65-67, 1018 Amsterdam, The Netherlands
bW. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wrocław 2, P.O. Box 937, Poland
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Transverse magnetoresistivity (H ∥ [001]; and current ∥ [110]) of U3As4 has been measured in field up to 35 T. An abrupt change of the magnetoresistivity behaviour from saturated (low field) to unsaturated (high field) type was observed at the spin reorientational transition (19.1 T at 4.2 K). The transition is accompanied by a peak in the magnetoresistivity. The behaviour is ascribed to fractional spin polarization of the band electrons.
DOI: 10.12693/APhysPolA.85.245
PACS numbers: 72.15.Gd, 75.50.Cc