Direct evidence for a dynamical ground state in the highly frustrated Tb$_2$Sn$_2$O$_7$ pyrochlore

F. Bert; P. Mendels; A. Olariu; N. Blanchard; G. Collin; A. Amato; C. Baines; A. D. Hillier

doi:10.1103/PhysRevLett.97.117203

Direct evidence for a dynamical ground state in the highly frustrated Tb$_2$Sn$_2$O$_7$ pyrochlore

Strongly Correlated Electrons 2009-11-11 v1

Authors: F. Bert , P. Mendels , A. Olariu , N. Blanchard , G. Collin , A. Amato , C. Baines , A. D. Hillier

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Abstract

MuSR experiments have been performed on powder sample of the "ordered spin ice" Tb $_2$ Sn $_2$ O $_7$ pyrochlore compound. At base temperature (T=35mK) the muon relaxation is found to be of dynamical nature which demonstrates that strong fluctuations persist below the ferromagnetic transition (T_C=0.87K). Hints of long range order appear as oscillations of the muon polarization when an external field is applied and also as a hysteretic behavior below T_C. We propose a dynamical and strongly correlated scenario where dynamics results from fluctuation of large spin clusters with the "ordered spin ice" structure.

Keywords

pyrochlore spin ice muon spin relaxation dynamical ground state frustrated magnetism Tb2Sn2O7

Cite

@article{arxiv.cond-mat/0603434,
  title  = {Direct evidence for a dynamical ground state in the highly frustrated Tb$_2$Sn$_2$O$_7$ pyrochlore},
  author = {F. Bert and P. Mendels and A. Olariu and N. Blanchard and G. Collin and A. Amato and C. Baines and A. D. Hillier},
  journal= {arXiv preprint arXiv:cond-mat/0603434},
  year   = {2009}
}

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Direct evidence for a dynamical ground state in the highly frustrated Tb$_2$Sn$_2$O$_7$ pyrochlore

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