DocumentCode :
1322593
Title :
Calculations of Phonon Density of States and Heating Rate by Molecular Dynamics in L1 
FePt
Author :
Zhang, Mengwei ; Wang, Longze ; Wei, Dan ; Gao, Kai-Zhong
Author_Institution :
Dept. of Mater. Sci. & Eng., Tsinghua Univ., Beijing, China
Volume :
48
Issue :
11
fYear :
2012
Firstpage :
3735
Lastpage :
3737
Abstract :
In this work, lattice dynamics is utilized to calculate the phonon spectrum of L10-FePt crystal and molecular dynamic (MD) method is constructed to calculate the phonon density of state (PDOS), which can be compared to the result of lattice dynamics. By the phonon spectrum and PDOS, the optimum mode and frequency of the laser to activate phonons is found in L10-FePt, and the heating rate using different frequency and mode of the laser has been schematically simulated by MD method.
Keywords :
heat treatment; iron alloys; magnetic recording; molecular dynamics method; phonons; platinum alloys; FePt; L10 alloy crystal; heating rate; laser frequency; laser optimum mode; lattice dynamics; magnetic recording system; molecular dynamics method; phonon density of states; phonon spectrum; Atomic beams; Heat-assisted magnetic recording; Laser modes; Lattices; Phonons; Resistance heating; Heat assisted magnetic recording (HAMR); laser; lattice dynamics; molecular dynamics (MDs); phonon spectrum;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2012.2196265
Filename :
6332982
Link To Document :
