Abstract
We measured the low-temperature ac magnetic susceptibilities ( , , and ), 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 and . 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.
- Received 12 April 1994
DOI:https://doi.org/10.1103/PhysRevLett.74.2379
©1995 American Physical Society