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Coherent spin oscillations in a disordered magnet

Ghosh, S. and Parthasarathy, R. and Rosenbaum, T. F. and Aeppli, G. (2002) Coherent spin oscillations in a disordered magnet. Science, 296 (5576). pp. 2195-2198. ISSN 0036-8075. doi:10.1126/science.1070731.

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Most materials freeze when cooled to sufficiently low temperature. We find that magnetic dipoles randomly distributed in a solid matrix condense into a spin liquid with spectral properties on cooling that are the diametric opposite of those for conventional glasses. Measurements of the nonlinear magnetic dynamics in the low-temperature liquid reveal the presence of coherent spin oscillations composed of hundreds of spins with lifetimes of up to 10 seconds. These excitations can be labeled by frequency and manipulated by the magnetic fields from a loop of wire and can permit the encoding of information at multiple frequencies simultaneously.

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Additional Information:© 2002 American Association for the Advancement of Science. Received for publication 11 February 2002. Accepted for publication 2 May 2002. We have benefited greatly from discussions with J. Brooke, P. Chandra, S. Coppersmith, and S. Girvin. The work at the University of Chicago was supported primarily by the Materials Research Science and Engineering Centers Program of NSF under award DMR-9808595.
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Issue or Number:5576
Record Number:CaltechAUTHORS:20140707-163030075
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46962
Deposited By: George Porter
Deposited On:14 Jul 2014 15:22
Last Modified:10 Nov 2021 17:32

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