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Topic: SVP Notes
Section: Reversal of Magnetic Fields
Table of Contents to this Topic
Reversal of Magnetic Fields

"The force necessary to flip a bit from the down to the up state is known as the coercive force and is a strong function of temperature. At room temperature, a normal magnet is too weak to flip the bits because the coercive force required is too high. Thus all the bits remain in the north-pole-down state in spite of the presence of the north-pole-up bias magnet in the drive. But at 150C, the coercive force required to flip a domain falls almost to zero, and the bias magnet field is strong enough to record a north-pole-up state."
See Also:

SVPcosmology
Dale Pond
Tulsa Seminar
Dale Pond and Atlin
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