| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration in an overwrite characteristic independently of environment conditions and variation in heads, in a magnetic disk device in which the magnetic head is projected by a write-current given to a write-element, while projection quantity is controlled by a heating element provided at the magnetic head. SOLUTION: During read-operation, electric power of sum of a first electric power value P2 and a second electric power value P1 is supplied to a heating element (36) of the magnetic head (3), during write-operation by a write-element (3-1) of the magnetic head (3), electric power of the first electric power value P2 is supplied to the heating element (36), also the write-element (3-1) is driven by write-electric-power. Control of variation in respective heads and projection in accordance with change in environment can be performed by the first electric power value, the overwrite characteristic is improved, while a read-characteristic can be improved. COPYRIGHT: (C)2008,JPO&INPIT
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