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Phys. Rev. B 70, 134408 (2004) [7 pages]

Neutron scattering investigation of the spin ice state in Dy2Ti2O7

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T. Fennell
The Royal Institution of Great Britain, 21 Albemarle Street, London W1S 4BS, United Kingdom.

O. A. Petrenko* and B. Fåk†
ISIS Facility, Rutherford-Appleton Laboratory, Chilton, Didcot OX11 0QX, United Kingdom

S. T. Bramwell‡
Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom

M. Enjalran§, T. Yavors’kii, and M. J. P. Gingras**
Department of Physics, University of Waterloo, Ontario N2L 3G1, Canada

R. G. Melko
Department of Physics, University of California, Santa Barbara, California 93106-9350, USA

G. Balakrishnan
Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom

Received 28 April 2004; published 15 October 2004

Dy2Ti2O7 has been advanced as an ideal spin ice material. We present a neutron scattering investigation of a single-crystal sample of 162Dy2Ti2O7. The scattering intensity has been mapped in zero applied field in the h,h,l and h,k,0 planes of reciprocal space at temperatures between 0.05 and 20 K. The measured diffuse scattering has been compared with 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.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.70.134408
DOI:
10.1103/PhysRevB.70.134408
PACS:
75.50.Lk, 75.40.Cx, 75.25.+z

*Present address: Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom.

†Present address: CEA Grenoble, DRFMC∕SPSMS, 38054, Grenoble, Cedex 9, France.

‡Electronic address: s.t.bramwell@ucl.ac.uk

§Present address: Department of Physics, Southern Connecticut State University, New Haven, CT 06515.

**Also at Canadian Institute for Advanced Research, 180 Dundas Street West, Toronto, Ontario, M5G 1Z8, Canada.

 
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