Magnetic Ordering in the Spin-Ice Candidate Ho$_2$Ru$_2$O$_7$

C. R. Wiebe; J. S. Gardner; S. -J. Kim; G. M. Luke; A. S. Wills; B. D. Gaulin; J. E. Greedan; I. Swainson; Y. Qiu; C. Jones

doi:10.1103/PhysRevLett.93.076403

Magnetic Ordering in the Spin-Ice Candidate Ho$_2$Ru$_2$O$_7$

Statistical Mechanics 2009-11-10 v1

Authors: C. R. Wiebe , J. S. Gardner , S. -J. Kim , G. M. Luke , A. S. Wills , B. D. Gaulin , J. E. Greedan , I. Swainson , Y. Qiu , C. Jones

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Abstract

Neutron scattering measurements on the spin-ice candidate material Ho $_2$ Ru $_2$ O $_7$ have revealed two magnetic transitions at T $\sim$ 95 K and T $\sim$ 1.4 K to long-range ordered states involving the Ru and Ho sublattices, respectively. Between these transitions, the Ho $^{3+}$ moments form short-ranged ordered spin clusters. The internal field provided by the ordered S=1 Ru $^{4+}$ moments disrupts the fragile spin-ice state and drives the Ho $^{3+}$ moments to order. We have directly measured a slight shift in the Ho $^{3+}$ crystal field levels at 95 K from the Ru ordering.

Keywords

spin ice magnetic ordering neutron scattering Ho2Ru2O7 crystal field

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@article{arxiv.cond-mat/0404235,
  title  = {Magnetic Ordering in the Spin-Ice Candidate Ho$_2$Ru$_2$O$_7$},
  author = {C. R. Wiebe and J. S. Gardner and S. -J. Kim and G. M. Luke and A. S. Wills and B. D. Gaulin and J. E. Greedan and I. Swainson and Y. Qiu and C. Jones},
  journal= {arXiv preprint arXiv:cond-mat/0404235},
  year   = {2009}
}

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4 pages, 5 figures, submitted to Phys. Rev. Letters

Magnetic Ordering in the Spin-Ice Candidate Ho$_2$Ru$_2$O$_7$

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