Dresden 2020 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 48: Poster Session: Many Body Systems, Quantum Critical Phenomena
TT 48.1: Poster
Wednesday, March 18, 2020, 15:00–19:00, P2/4OG
Low temperature magnetoresistance and Hall effect measurements of YbNi4P2 — •William Broad1, Sven Friedemann1, Kristin Kliemt2, and Cornelius Krellner2 — 1HH Wills Laboratory, University of Bristol, UK — 2Physikalisches Institut, Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany
YbNi4P2 is a heavy-fermion Kondo-lattice metal with a very low ferromagnetic ordering temperature of 0.17 K. The transition temperature can be suppressed by partial substitution of As on the P site, leading to a quantum critical point (QCP). The rarity of such a QCP makes YbNi4P2 an important material to study for the understanding of ferromagnetic quantum criticality. Magnetoresistance and Hall effect data on YbNi4P2 are presented from low temperature dilution refrigeration measurements between 35 mK and 1 K. We have observed several Lifshitz transitions with a new orientation of the magnetic field in the ab plane, and discuss the anomalous Hall effect in the ferromagnetic state.