Spin glass dynamics at the mesoscale

The mesoscale allows a new probe of spin glass dynamics. Because the spin glass lower critical dimension dl > 2, the growth of the correlation length [xi](t, T) can change the nature of the spin glass state at a crossover time t sub(CO) when [xi](t sub(CO), T) = l, a minimum characteristic sample...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2015-01, Vol.91 (1), Article 014434
Main Authors: Guchhait, Samaresh, Kenning, Gregory G., Orbach, Raymond L., Rodriguez, Gilberto F.
Format: Article
Language:English
Subjects:
Condensed matter
Correlation
correlations length
Crossovers
Crystallites
Dynamics
Film thickness
MATERIALS SCIENCE
mesoscale
Mesoscale phenomena
Spin glass
spin glasses
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The mesoscale allows a new probe of spin glass dynamics. Because the spin glass lower critical dimension dl > 2, the growth of the correlation length [xi](t, T) can change the nature of the spin glass state at a crossover time t sub(CO) when [xi](t sub(CO), T) = l, a minimum characteristic sample length (e.g., film thickness for thin films and crystallite size for bulk samples). The parallel correlation length, associated with a Tg = 0 transition, increases in time from the saturated value of the perpendicular correlation length l to an equilibrium value of the parallel correlation length proportional to T super(-)v. This results in a pancakelike correlated state, with a thickness l and a temperature-dependent in-plane radius that increases with decreasing temperature. Properties dependent upon an effective waiting time t super(eff) w are derived that are consistent with experiment, and further measurements are suggested.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.91.014434