Relaxation dynamics in a reentrant (FeNi)Mn ferromagnet: A percolation analysis
- 15 May 1994
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 75 (10) , 5844-5846
- https://doi.org/10.1063/1.355534
Abstract
Measurements of the low‐field thermoremanent relaxation in a reentrant (Fe0.65Ni0.35)1−xMnx ferromagnet with x=0.117 reveal a crossover, in the vicinity of the reentrant transition, from equilibrium dynamics in the ferromagnetic phase to age‐dependent, nonequilibrium dynamics in the reentrant phase. Least‐squares fits to two mesoscopically exact relaxation functions show that both dynamic regimes can be described within a common theoretical framework of magnon relaxation on a percolation distribution of fixed, finite domains of dynamically correlated spins.This publication has 8 references indexed in Scilit:
- Non-equilibrium relaxation dynamics in the spin glass and ferromagnetic phases of CrFePhilosophical Magazine Part B, 1993
- The low-field magnetoresistance properties of the re-entrant spin-glass system (Fe0.65Ni0.35)1-xMnxJournal of Physics: Condensed Matter, 1992
- Magnetic phase diagram of the reentrant spin glass system (Fe0.65Ni0.35)1−xMnxJournal of Magnetism and Magnetic Materials, 1992
- Spurious re-entrant behaviour in a system with short-range orderPhilosophical Magazine Part B, 1991
- Percolation model for relaxation in random systemsPhysical Review Letters, 1990
- Nonequilibrium dynamics of spin glassesPhysical Review B, 1988
- A domain theory for linear and nonlinear aging effects in spin glassesJournal de Physique, 1988
- Cluster size distribution above the percolation thresholdJournal of Physics A: General Physics, 1981