Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2004-02-20
Physics
Condensed Matter
Disordered Systems and Neural Networks
5 pages, 4 figures
Scientific paper
It is currently believed that the decay of the thermoremanent magnetization in spin glasses is composed of two terms; The "stationary" term which does not depend on the sample history and dominates the short time decay ($<1s$) and a long time aging term which depends on the samples history. The sample history includes both the thermal history and the time spent in a magnetic field (waiting time) before that field is removed. We report finding a third component of the decay at times much larger than the waiting time. This decay is independent of the waiting time, but part of the same mechanism that produces aging. We explain this decay in terms of the initial state distribution that is developed during the cooling process. This explanation is tested by performing Iso-thermoremanent magnetization decay measurements. Follow up calculations using the Spin Glass phase space barrier model suggest that the long time decay is logarithmic and that the maximum aging time is approximately three thousand years, in this sample, at a measuring temperature of .83 $T_{g}$.
Kenning Gregory G.
Orbach R.
Rodriguez G. F.
No associations
LandOfFree
Very Long Time Magnetization Decay in Spin Glasses does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Very Long Time Magnetization Decay in Spin Glasses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Very Long Time Magnetization Decay in Spin Glasses will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-709118