| 摘要 |
In a magnetic disk device, a magnetic head protrudes when a write current is applied to a write element, and the protrusion amount is controlled using a heat generating element provided on the magnetic head. During read operations, power equal to the sum of a first power value and a second power value is supplied to the heat generating element of the magnetic head, and during write operations, power equal to the first power value is supplied to the heat generating element in addition to the write power. In this manner, protrusion can be controlled to compensate for scattering among the heads and changes in ambient conditions, so that overwrite characteristics can be improved, and read characteristics can also be improved.
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