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27 April 2024

» arxiv » cond-mat/0404235

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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 ;
Date:	9 Apr 2004
Subject:	Statistical Mechanics \| cond-mat.stat-mech
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.
Source:	arXiv, cond-mat/0404235
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