TY - JOUR
T1 - Simulation of heat-assisted magnetic recording using renormalized media cells
AU - Victora, R. H.
AU - Huang, Pin Wei
PY - 2013
Y1 - 2013
N2 - A new scheme for the simulation of heat-assisted magnetic recording (HAMR) that systematically includes fluctuating material properties above a predefined length scale, while retaining magnetostatic interactions, is introduced. Renormalized media parameters M\rm s, K\rm u, A \rm ex, and \alpha\rm damp, suitable for useful length scales, are found numerically. These renormalized parameters are then used to model the Voronoi-cell-composed medium in the HAMR simulation. Transition jitters are obtained under various conditions. The results show that moderate maximum temperature of the heat spot, intergranular exchange coupling, media thickness of at least 10 nm, nonzero canting angle of the head field, relatively low head velocity, and large head-field strength are helpful for a successful recording.
AB - A new scheme for the simulation of heat-assisted magnetic recording (HAMR) that systematically includes fluctuating material properties above a predefined length scale, while retaining magnetostatic interactions, is introduced. Renormalized media parameters M\rm s, K\rm u, A \rm ex, and \alpha\rm damp, suitable for useful length scales, are found numerically. These renormalized parameters are then used to model the Voronoi-cell-composed medium in the HAMR simulation. Transition jitters are obtained under various conditions. The results show that moderate maximum temperature of the heat spot, intergranular exchange coupling, media thickness of at least 10 nm, nonzero canting angle of the head field, relatively low head velocity, and large head-field strength are helpful for a successful recording.
KW - Heat-assisted magnetic recording (HAMR)
KW - Landau-Liftshitz-Gilbert
KW - renormalization
KW - transition jitter
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U2 - 10.1109/TMAG.2012.2219300
DO - 10.1109/TMAG.2012.2219300
M3 - Article
AN - SCOPUS:84873802999
SN - 0018-9464
VL - 49
SP - 751
EP - 757
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 2
M1 - 6416984
ER -