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Neutron Scattering Investigation of the Spin Ice State in Dy2Ti2O7

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arxiv cond-mat/0404594 v2 pith:ZSW6YFEG submitted 2004-04-26 cond-mat.dis-nn

Neutron Scattering Investigation of the Spin Ice State in Dy2Ti2O7

classification cond-mat.dis-nn
keywords scatteringdy2ti2o7spinbeendipolarinvestigationmodelneutron
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Dy2Ti2O7 has been advanced as an ideal spin ice. We present a neutron scattering investigation of a sample of 162Dy2Ti2O7. The scattering intensity has been mapped in zero applied field in the hhl and hk0 planes at temperatures between 0.05 K and 20 K. The measured diffuse scattering (in the static approximation) has been compared to that predicted by the dipolar spin ice model. The comparison is good, except at the Brillouin zone boundaries where extra scattering appears in the experimental data. It is concluded that the dipolar spin ice model provides a successful basis for understanding Dy2Ti2O7, but that there are issues which remain to be clarified.

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