Title :
Dynamic response of the magnetization to rapid heating in the picosecond regime
Author :
Kazantseva, N. ; Hohlfeld, J. ; Rebei, A. ; Chantrell, R.W. ; Nowak, U.
Author_Institution :
Univ. of York, York
Abstract :
The problem of the dynamic response of a magnetic system to pulsed laser heating was addressed. The magnetic system is modeled at the atomistic level, using a classical spin Hamiltonian with the Heisenberg form of the exchange interaction and a local uniaxial anisotropy. The material parameters used corrersponds to permalloy. It was shown that the rapid decrease of the magnetization is predicted naturally by a simple atomistic model based Landau-Lifshitz-Gilbert (LLG) equation with Langevin dynamics.
Keywords :
Heisenberg model; Permalloy; exchange interactions (electron); high-speed optical techniques; laser beam applications; magnetic anisotropy; spin Hamiltonians; spin dynamics; Heisenberg form; Landau-Lifshitz-Gilbert equation; Langevin dynamics; NiFe; classical spin Hamiltonian; exchange interaction; local uniaxial anisotropy; magnetization; permalloy; picosecond regime; pulsed laser heating; rapid heating; Anisotropic magnetoresistance; Atomic beams; Elementary particle exchange interactions; Heating; Laser modes; Magnetic anisotropy; Magnetic materials; Magnetization; Optical pulses; Perpendicular magnetic anisotropy;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.375541
