PIRSA:14050019 Conference

DOI10.48660/14050019

Conference/School: 4 Corners Southwest Ontario Condensed Matter Physics Symposium 2014

Gaulin, B. (2014). Frozen Spin Ice Ground States in the Pyrochlore Magnet Tb2 Ti2 O7. Perimeter Institute. https://pirsa.org/14050019

Gaulin, Bruce. Frozen Spin Ice Ground States in the Pyrochlore Magnet Tb2 Ti2 O7. Perimeter Institute, May. 01, 2014, https://pirsa.org/14050019 

@misc{ pirsa_PIRSA:14050019,
  doi = {10.48660/14050019},
  url = {https://pirsa.org/14050019},
  author = {Gaulin, Bruce},
  keywords = {},
  language = {en},
  title = {Frozen Spin Ice Ground States in the Pyrochlore Magnet Tb2 Ti2 O7},
  publisher = {Perimeter Institute},
  year = {2014},
  month = {may},
  note = {PIRSA:14050019 see, \url{https://pirsa.org}}
}

Abstract

Tb2Ti2O7 was one of the first pyrochlore magnets to be studied as a candidate for a spin liquid or cooperative paramagnet, and its ground state has remained enigmatic for fifteen years. Recent time-of-flight neutron scattering studies have shown that it enters a glassy Spin Ice ground state, characterized by frozen short range order over about 8 conventional unit cells, and the formation of a ~ 0.08 meV gap in its spin excitation spectrum at the appropriate quasi-Bragg wave vectors. I will introduce the relevant Spin Ice physics background, and describe how the experiments are performed. The new H-T phase diagram for Tb2Ti2O7 in a [110] magnetic field will be presented. This shows that its frozen (i.e. glassy) Spin Ice ground state (at low temperature and zero field) and its conventional field-induced ordered phase (at low temperature and high fields) bracket the cooperative paramagnetic phase which generated the original interest in this fascinating magnet.

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