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Interplay of disorder and geometrical frustration in doped gadolinium gallium garnet

Woo, N. and Silevitch, D. M. and Ferri, C. and Ghosh, S. and Rosenbaum, T. F. (2015) Interplay of disorder and geometrical frustration in doped gadolinium gallium garnet. Journal of Physics: Condensed Matter, 27 (29). Art. No. 296001. ISSN 0953-8984. doi:10.1088/0953-8984/27/29/296001.

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The geometrically frustrated triangular antiferromagnet Gadolinium Gallium Garnet (Gd_3Ga_5O_(12) or GGG) exhibits a rich mix of short-range order and isolated quantum states. We investigate the effects of up to 1% neodymium substitution for gallium on the ac magnetic response at temperatures below 1 K in both the linear and nonlinear regimes. Substitutional disorder actually drives the system toward a more perfectly frustrated state, apparently compensating for the effects of imperfect gadolinium/gallium stoichiometry, while at the same time more closely demarcating the boundaries of isolated, coherent clusters composed of hundreds of spins. Optical measurements of the local Nd environment substantiate the picture of an increased frustration index with doping.

Item Type:Article
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URLURL TypeDescription Paper
Silevitch, D. M.0000-0002-6347-3513
Additional Information:© 2015 IOP Publishing. Received 2 April 2015, revised 25 May 2015; Accepted for publication 3 June 2015; Published 8 July 2015. We thank Y. Feng for assistance with the single crystal x-ray diffraction performed at sector 4 of the APS at Argonne National Laboratory. Work at the University of Chicago was supported by the Department of Energy Office of Basic Energy Sciences, Grant No DE-FG02-99ER45789 and work at the University of California, Merced was supported by the National Science Foundation, Grant No DMR-1056860.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-99ER45789
Subject Keywords:frustrated magnetism; disorder; gadolinium gallium garnet
Issue or Number:29
Record Number:CaltechAUTHORS:20150820-094345118
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Official Citation:Interplay of disorder and geometrical frustration in doped gadolinium gallium garnet N Woo et al 2015 J. Phys.: Condens. Matter 27 296001
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59783
Deposited On:21 Aug 2015 18:28
Last Modified:12 Jul 2022 16:38

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