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TT: Fachverband Tiefe Temperaturen

TT 17: Correlated Electrons: Quantum-Critical Phenomena 1

TT 17.4: Vortrag

Dienstag, 24. März 2009, 14:45–15:00, HSZ 03

Pressure Dependence of the Magnetization and Magnetotransport in Ferromagnetic Pr₅Si₃ — Christian Franz¹, •Stefan Legl¹, Christian Pfleiderer¹, Philipp Niklowitz¹, Dmitri Souptel², and Günther Behr² — ¹Physik Department E21, Technische Universität München, D-85748 Garching, Germany — ²Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, PF270116, 01171 Dresden, Germany

Pr₅Si₃ is an easy-plane ferromagnet with a comparatively low Curie temperature. We report the pressure dependence of the magnetization under pressures up to 18 kbar at magnetic fields up to 9 T. We have further measured the magnetotransport properties under pressure up to 60 kbar and magnetic field up to 14 T using a Bridgman pressure cell. Anomalous contributions to the Hall signal allow us to track the magnetic state up to the highest pressures studied. Our data suggest that the magnetic state of Pr₅Si₃ fairly abruptly develops an additional modulation for pressure in excess of ∼25 kbar, thus avoiding ferromagnetic quantum criticality.