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Crystallographically amorphous ferrimagnetic alloys: Comparing a tocaliied atornisik spin model with experiments.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Jul2011, Vol. 84 Issue 2, p24407.1-24407.9. 9p. - Publication Year :
- 2011
-
Abstract
- We present a computational model of crystallographically amorphous ferrimagnetic alloys using a stochastic Landau-Lifshitz-Gilbert equation of motion for atomistic spins and an atomistic spin Hamiltonian with Heisenberg exchange. The spontaneous equilibrium magnetization is calculated and a comparison with a mean field model is made. The simulations show excellent agreement with experiments on GdFeCo using x-ray magnetic circular dichroism to determine the individual sublattice magnetizations. The calculated temperature dependence of the magnetization shows a polarization of the Gd sublattice leading to a common Curie temperature, in agreement with the experimental data. The intersublattice exchange is shown to be an important energy transfer channel for ultrafast dynamics. [ABSTRACT FROM AUTHOR]
- Subjects :
- *FERROMAGNETISM
*MAGNETOOPTICS
*CIRCULAR dichroism
*PARAMAGNETISM
*MAGNETIZATION
Subjects
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 84
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 66700899
- Full Text :
- https://doi.org/10.1103/PhysRevB.84.024407