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Macroscopic Signature of Protected Spins in a Dense Frustrated Magnet

Ghosh, S. and Rosenbaum, T. F. and Aeppli, G. (2008) Macroscopic Signature of Protected Spins in a Dense Frustrated Magnet. Physical Review Letters, 101 (15). Art. No. 157205. ISSN 0031-9007. doi:10.1103/PhysRevLett.101.157205.

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The inability of systems of interacting objects to satisfy all constraints simultaneously leads to frustration. A particularly important consequence of frustration is the ability to access certain protected parts of a system without disturbing the others. For magnets such "protectorates'' have been inferred from theory and from neutron scattering, but their practical consequences have been unclear. We show that a magnetic analogue of optical hole-burning can address these protected spin clusters in a well-known, geometrically frustrated Heisenberg system, gadolinium gallium garnet. Our measurements additionally provide a resolution of a famous discrepancy between the bulk magnetometry and neutron diffraction results for this magnetic compound.

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Additional Information:© 2008 The American Physical Society. Received 23 April 2008; revised manuscript received 18 August 2008; published 10 October 2008. The work at the University of Chicago was supported by DOE BES under Grant No. DE-FG02-99ER45789. G.A. acknowledges support from the Wolfson Foundation, EPSRC and the Rockefeller Foundation for a stay devoted to this manuscript at the Bellagio Study Center.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-99ER45789
Wolfson FoundationUNSPECIFIED
Rockefeller FoundationUNSPECIFIED
Issue or Number:15
Classification Code:PACS numbers: 75.40.Gb, 75.45.+j, 75.50.Dd, 75.50.Lk
Record Number:CaltechAUTHORS:20140707-163025962
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46933
Deposited By: George Porter
Deposited On:11 Jul 2014 03:44
Last Modified:10 Nov 2021 17:31

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