Phys. Rev. Lett. 74, 2379–2382 (1995)Frustration Induced Spin Freezing in a Site-Ordered Magnet: Gadolinium Gallium GarnetReceived 12 April 1994; revised 21 December 1994; published in the issue dated 20 March 1995 We measured the low-temperature ac magnetic susceptibilities ( χ′, χ′′, and χ3), static magnetization, and the specific heat of a high-quality single crystal of gadolinium gallium garnet (GGG), which is a geometrically frustrated Heisenberg magnet. We find a spin glass transition at low temperatures, in addition to unusual behavior in χ′′ and χ3. Comparison to nonmagnetic isomorphs and the low levels of structural and chemical disorder in GGG suggests that the transition is due to the highly frustrated geometry of the magnetic lattice. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.74.2379
DOI:
10.1103/PhysRevLett.74.2379
PACS:
75.50.Lk, 75.40.Gb
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