With recent developments in heat assisted magnetic recording (HAMR), characterization of
HAMR media is becoming very important. We present a multi-functional instrument for testing
HAMR media, which integrates HAMR writing, reading, and a micro-magneto-optic Kerr effect
(l-MOKE) testing function. A potential application of the present instrument is to make
temperature dependent magnetic property measurement using a pump-probe configuration. In the
measurement, the media is heated up by a heating (intense) beam while a testing (weak) beam is
overlapped with the heating beam for MOKE measurement. By heating the media with different
heating beam power, magnetic measurements by MOKE at different temperatures can be
performed. Compared to traditional existing tools such as the vibrating sample magnetometer,
the present instrument provides localized and efficient heating at the measurement spot. The
integration of HAMR writing and l-MOKE system can also facilitate a localized full investigation
of the magnetic media by potential correlation of HAMR head independent write/read performance
to localized magnetic properties.
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Copyright (2014) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 115, 17B726 (2014) and may be found at http://dx.doi.org/10.1063/1.4865969.