Abstract
We describe a method to estimate the thermal conductivity of the
substrate, the dielectric layer, and the magneto-optic (MO) layer
of MO recording media. The method relies on the disappearance of
the polar Kerr rotation above the Curie temperature of the MO
layer. We obtain the thermal conductivities by taking into account
the differences in the heat diffusion behavior under different sized
focused spots. The results are reliable to better than 5%
accuracy.
© 2000 Optical Society of America
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