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Low-temperature muon spin rotation studies of the monopole charges and currents in Y doped Ho2Ti2O7

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Chang, L. J. (Lieh-Jeng), Lees, Martin R., Balakrishnan, Geetha, Kao, Y.-J. (Ying-Jer) and Hillier, A. D. (Adrian D.) (2013) Low-temperature muon spin rotation studies of the monopole charges and currents in Y doped Ho2Ti2O7. Scientific Reports, Volume 3 . Article number 1881. doi:10.1038/srep01881

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Official URL: http://dx.doi.org/10.1038/srep01881

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Abstract

In the ground state of Ho2Ti2O7 spin ice, the disorder of the magnetic moments follows the same rules as the proton disorder in water ice. Excitations take the form of magnetic monopoles that interact via a magnetic Coulomb interaction. Muon spin rotation has been used to probe the low-temperature magnetic behaviour in single crystal Ho2−xYxTi2O7 (x = 0, 0.1, 1, 1.6 and 2). At very low temperatures, a linear field dependence for the relaxation rate of the muon precession λ(B), that in some previous experiments on Dy2Ti2O7 spin ice has been associated with monopole currents, is observed in samples with x = 0, and 0.1. A signal from the magnetic fields penetrating into the silver sample plate due to the magnetization of the crystals is observed for all the samples containing Ho allowing us to study the unusual magnetic dynamics of Y doped spin ice.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Magnetic materials, Magnetic monopoles, Ferromagnetism, Electronics -- Materials, Electromagnetism
Journal or Publication Title: Scientific Reports
Publisher: Nature Publishing Group
ISSN: 2045-2322
Official Date: 23 May 2013
Dates:
DateEvent
23 May 2013Published
Volume: Volume 3
Page Range: Article number 1881
DOI: 10.1038/srep01881
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: Engineering and Physical Sciences Research Council (EPSRC), Guo jia ke xue wei yuan hui [National Science Council (Taiwan)], Advantage West Midlands (AWM), European Regional Development Fund (ERDF)
Grant number: EP/I007210/1 (EPSRC); NSC 101-2112-M-006-010-MY3 [National Science Council (Taiwan)]

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