F. Gulminelli, Ph. Chomaz
Published 2004-10-17Version 1
The purpose of this proposal is to study the ferro/para phase transition in a mesoscopic Ising-like lattice and in particular demonstrate the existence of a negative magnetic susceptibility in the fixed magnetization ensemble. To this aim we will use the correlation < S(r) S(r+Dr) > = < M2>/N2 where N is the total number of spins for a single cluster, M the total magnetization of the cluster, and the equality holds if we choose r0<Dr<R where r0 is the linear size of a spin site and R is the linear size of a cluster.
Negative magnetic susceptibility and nonequivalent ensembles for the mean-field $φ^4$ spin model
Correlation between entropy and generalizability in a neural network
Dissipation, Correlation and Lags in Heat Engines
