Abstract
The nature of the spin state below the spin freezing temperature was studied in an icosahedral Tb-Mg-Zn quasicrystal by thermoremanent dc magnetization time decay as a function of aging time and magnetic field. The system does not exhibit a highly degenerate free-energy landscape obeying an ultrametric organization of metastable states, which makes it essentially different from canonical spin glasses. The Tb-Mg-Zn system can be considered as a special class of spin glass, which possesses some local order, but still preserves the notion of spin freezing.
- Received 28 August 2001
DOI:https://doi.org/10.1103/PhysRevB.64.224209
©2001 American Physical Society