Abstract

Previously we described a method for estimating the thermal conductivity of magneto-optic recording media. The method relies on identifying the laser power that brings the maximum temperature of the TbFeCo layer to as high as the Curie temperature. We extensively use a similar method to estimate the heat capacity of a dielectric layer, a TbFeCo layer, and an aluminum alloy layer of magneto-optic recording media. Measurements are conducted on static disks with a beam of light focused on a TbFeCo layer. The method has the advantage of thermal diffusion depending on a multilayer structure and irradiation time.

© 2002 Optical Society of America

Estimation of thermal conductivity of magneto-optic media

Xiaodong Xun, Chubing Peng, and Masud Mansuripur
Appl. Opt. 39(24) 4355-4360 (2000)

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Thermal properties and crystallization dynamics of a phase-change alloy for write-once optical data storage

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