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Magnetic correlations in the spin ice Ho2-xYxTi2O7 as revealed by neutron polarization analysis

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Chang, L. J., Su, Y., Kao, Y-J., Chou, Y. Z., Mittal, R., Schneider, H., Brueckel, Th., Balakrishan, G. and Lees, Martin R. (2010) Magnetic correlations in the spin ice Ho2-xYxTi2O7 as revealed by neutron polarization analysis. Physical Review B, Vol.82 (No.17). Article: 172403 . doi:10.1103/PhysRevB.82.172403

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Official URL: http://dx.doi.org/10.1103/PhysRevB.82.172403

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Abstract

We present single-crystal magnetic diffuse neutron-scattering measurements with polarization analysis on the spin ice Ho2-xYxTi2O7 (x=0, 0.3, and 1). At 2 K, the spin-flip scattering patterns are typical of a nearest-neighbor spin ice and the effects of Y doping are seen in the widths of the pinch points. At low temperature, the spin-flip patterns are characteristic of a dipolar spin ice and are unaffected by Y doping. In the nonspin-flip channel, we observe the signature of strong antiferromagnetic correlations at the same temperature as the dipolar spin-ice correlations appear in the spin-flip channel. These experimental observations have been well reproduced by our Monte Carlo simulations.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review B
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 5 November 2010
Dates:
DateEvent
5 November 2010Published
Volume: Vol.82
Number: No.17
Number of Pages: 4
Page Range: Article: 172403
DOI: 10.1103/PhysRevB.82.172403
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: NTU
Grant number: 98R0066-65, 98R0066-68, NSC 96-2739-M-213-001, NSC 99-2112-M-007-020, NSC 97-2628-M-002-011-MY3

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