Abstract
Narrow track write/read properties in laser-assisted magnetic recording were investigated by using a TbFeCo magnetic recording film with perpendicular anisotropy. The effect of a smaller size of an assisting beam with a blue laser diode was a focused issue in this study. Thermal simulation results combining the temperature-dependent magnetic properties gave us a good insight into crosstalk canceling function in laser-assisted magnetic recording. Also, the dependence of recorded bit shape on an assisted laser power was well explained by using a macromagnetic simulation regarding bit formation. Thereby the thermal profile in the magnetic recording media was found to be crucial for the narrow track write/read performance in laser-assisted magnetic recording. By adjusting both media properties and the assist laser power, we have demonstrated the possibility of the 100ktpi recording with a narrow track pitch of less than a half of the assisting beam size.
