Two Dimensional Kagome Correlations and Field Induced Order in the Ferromagnetic XY Pyrochlore Yb2Ti2O7

K. A. Ross; J. P. C. Ruff; C. P. Adams; J. S. Gardner; H. A. Dabkowska; Y. Qiu; J. R. D. Copley; B. D. Gaulin

doi:10.1103/PhysRevLett.103.227202

Two Dimensional Kagome Correlations and Field Induced Order in the Ferromagnetic XY Pyrochlore Yb2Ti2O7

Strongly Correlated Electrons 2010-02-08 v2

Authors: K. A. Ross , J. P. C. Ruff , C. P. Adams , J. S. Gardner , H. A. Dabkowska , Y. Qiu , J. R. D. Copley , B. D. Gaulin

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Abstract

Neutron scattering measurements show the ferromagnetic XY pyrochlore Yb2Ti2O7 to display strong quasi-two dimensional (2D) spin correlations at low temperature, which give way to long range order (LRO) under the application of modest magnetic fields. Rods of scattering along < 111 > directions due to these 2D spin correlations imply a magnetic decomposition of the cubic pyrochlore system into decoupled kagome planes. A magnetic field of ~0.5 T applied along the [1-10] direction induces a transition to a 3D LRO state characterized by long-lived, dispersive spin waves. Our measurements map out a complex low temperature-field phase diagram for this exotic pyrochlore magnet.

Keywords

frustrated magnetism kagome lattice spin excitations in condensed matter

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@article{arxiv.0902.0329,
  title  = {Two Dimensional Kagome Correlations and Field Induced Order in the Ferromagnetic XY Pyrochlore Yb2Ti2O7},
  author = {K. A. Ross and J. P. C. Ruff and C. P. Adams and J. S. Gardner and H. A. Dabkowska and Y. Qiu and J. R. D. Copley and B. D. Gaulin},
  journal= {arXiv preprint arXiv:0902.0329},
  year   = {2010}
}

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5 pages, 4 figures

Two Dimensional Kagome Correlations and Field Induced Order in the Ferromagnetic XY Pyrochlore Yb2Ti2O7

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