https://doi.org/10.1140/epjb/e2004-00339-x
Aging, rejuvenation, and memory effects in short-range Ising spin glass: Cu0.5Co0.5Cl2-FeCl3 graphite bi-intercalation compound
Department of Physics, State University of New York at
Binghamton, Binghamton, New York 13902-6000, USA
Corresponding author: a suzuki@binghamton.edu
Received:
31
July
2003
Revised:
13
September
2004
Published online:
5
November
2004
Non-equilibrium aging dynamics in 3D Ising spin glass
Cu0.5Co0.5Cl2-FeCl3 GBIC has been studied by zero-field
cooled (ZFC) magnetization and low frequency AC magnetic susceptibility (f
= 0.05 Hz), where K. The time dependence of the
relaxation rate S(t) = (1/H)d
d
for the ZFC magnetization
after the ZFC aging protocol, shows a peak at a characteristic time
tcr near a wait time tw (aging behavior), corresponding to a
crossover from quasi equilibrium dynamics to non-equilibrium. The time tcr strongly depends
on tw, temperature (T), magnetic field (H), and the temperature shift (
). The rejuvenation effect is
observed in both
and
under the
T-shift and H-shift procedures. The memory of the specific spin
configurations imprinted during the ZFC aging protocol can be recalled when
the system is re-heated at a constant heating rate. The aging,
rejuvenation, and memory effects observed in the present system are
discussed in terms of the scaling concepts derived from numerical studies
on 3D Edwards-Anderson spin glass model.
PACS: 75.50.Lk – Spin glasses and other random magnets / 75.10.Nr – Spin-glass and other random models / 75.40.Gb – Dynamic properties
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004