NDLI: Writing temperature estimation in thermomagnetic recording

Content Provider	IEEE Xplore Digital Library
Author	McDaniel, T.W. Madison, M.R.
Copyright Year	1965
Abstract	A thermal conduction model calibrated with the aid of the measured temperature dependence of the magnetooptic (MO) Kerr effect and MO recording readback data taken with variable reading laser power and disk velocity has been used to provide an estimate of the absolute writing temperature in thermomagnetic recording on MO media. This procedure assumes that such writing is essentially a thermal thresholding phenomenon and that magnetic effects in writing are secondary. The key elements of this method include the following: (a) availability of a flexible thermal model properly calibrated for the MO media under study; (b) measurements of the Kerr rotation of the MO material versus temperature; (c) an accurate experimental method for measuring the differential Kerr readout signal with a dynamic MO disk tester; and (d) experimental data of thermomagnetic writing that is well fitted by a model illustrating the validity of the simple threshold writing temperature concept. The simultaneous regression fitting of a thermal model of MO readback to experimental data results in a fully self-consistent procedure.<>
Sponsorship	IEEE Magnetics Society
Starting Page	2834
Ending Page	2836
Page Count	3
File Size	321088
File Format	PDF
ISSN	00189464
Volume Number	26
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-09-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Writing Disk recording Magnetooptic recording Temperature dependence Rotation measurement Thermal conductivity Power measurement Velocity measurement Thermal variables measurement Temperature measurement
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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