Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 6: Frustrated Magnets - Spin Liquids (joint session TT/MA)

MA 6.3: Vortrag

Montag, 1. April 2019, 15:30–15:45, Theater

Magnetisation Avalanches in Classical Spin Ice Dy2Ti2O7 — •M. Kleinhans1, C. Duvinage1, D. Prabhakaran2, A. T. Boothroyd2, and C. Pfleiderer11Physik-Department, Technische Universität München, D-85748 Garching, Germany — 2Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, United Kingdom

Spin ice attracts great interest as a state in which emergent fractionalized excitations and magnetic-field induced topological forms of order may occur [1]. We report vibrating coil magnetometry down to mK temperatures [2,3] of Dy2Ti2O7, addressing the evidence of putative magnetisation avalanches in the spin-frozen state which depend sensitively in number and size on the magnetic field ramp rate, sample shape and quality. These avalanches have been interpreted in terms of magnetic monopole dynamics [4].
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