Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 40: Poster Session Correlated Electrons
TT 40.63: Poster
Mittwoch, 13. März 2013, 15:00–19:00, Poster D
Vibrating-coil magnetometry in rare-earth pyrochlore compounds — •Christopher Krey1, Stefan Legl1, Sarah R. Dunsiger1, Jason S. Gardner2, Jennifer M. Roper3, Hanna A. Dabkowska4, Jose A. Rodriguez5, Graeme M. Luke5, and Christian Pfleiderer1 — 1Physik-Department E21, Technische Universität München, Garching — 2Department of Physics, Indiana University, Bloomington, USA — 3Los Alamos National Laboratory, New Mexico, USA — 4Brockhouse Institute for Materials Research, McMaster University, Hamilton, Canada — 5Department of Physics and Astronomy, McMaster University, Hamilton, Canada
An important characteristic of the spin ice systems Dy2Ti2O7 and Ho2Ti2O7 as well as the spin liquid system Tb2Ti2O7 is the observation of spin freezing below a few hundred mK. We report vibrating coil magnetometry down to mK temperatures of these systems, addressing the evidence for field-induced transitions [1,2]. Of particular interest is evidence of putative magnetisation avalanches in the spin-frozen state, which for the case of Dy2Ti2O7 have been interpreted as magnetic monopole avalanches [3].
[1] C. Krey et al., Phys. Rev. Lett. 108, 257204 (2012)
S. Legl et al., Phys. Rev. Lett. 109, 047201 (2012))
D. Slobinsky et al., Phys. Rev. Lett. 105, 267205 (2010)