Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 72: Poster Session: Correlated Electrons
TT 72.56: Poster
Mittwoch, 14. März 2018, 15:00–19:00, Poster B
Splitting of the magnetic monopole excitation energy in spin ice — •Jacob Hornung1,2, Tino Gottschall1, Mathis Antlauf3, Lars Opherden1,2, Thomas Herrmannsdörfer1, and Jochen Wosnitza1,2 — 1Hochfeld-Magnetlabor Dresden (HLD-EMFL), HZDR, Dresden, Germany — 2Institut für Festkörper- und Materialphysik,TU Dresden, Germany — 3Institut für Anorganische Chemie, TU Bergakademie Freiberg, Germany
We present a new model for the magnetic monopole excitation process in spin-ice systems. In this approach, we include the interactions of the electric dipole moments which where priviously predicted to emerge in consequence of the formation of magnetic monopoles. By that, the model allows for describing the temperature-dependent spin relaxation time. We compare this relaxation-time behavior with data received for the three spin-ice systems Dy2Sn2O7, Dy2Ti2O7 and Dy2Ge2O7. By that we also determine the magnitude of their electrical dipole interactions.