Effective collective barrier for magnetic relaxation in frozen ferrofluids
Condensed Matter
2011-11-09 v1
Abstract
Magnetic relaxation and frequency response were measured in frozen ferrimagnetic colloids of different concentrations. A crossover from reversible to irreversible behavior is observed for concentrated colloids. In irreversible state, magnetic relaxation is time-logarithmic over seven orders of magnitude of experimental time windows. A master curve construction within mean field phenomenological model is applied to extract effective collective barrier as a function of the irreversible magnetization. The barrier logarithmically diverges, providing evidence for self-organized critical behavior during magnetic relaxation in frozen ferrofluids.
Keywords
Cite
@article{arxiv.cond-mat/0312087,
title = {Effective collective barrier for magnetic relaxation in frozen ferrofluids},
author = {Ruslan Prozorov and Tanya Prozorov and Alexey Snezhko},
journal= {arXiv preprint arXiv:cond-mat/0312087},
year = {2011}
}