Magnetic head slider and magnetic disk drive

A magnetic disk drive comprising:

• a magnetic disk on which data are recorded along tracks;
• a spindle motor for rotating the magnetic disk;
• a magnetic head slider flying above the rotating magnetic disk and reading and writing data from/to the magnetic disk, the magnetic head slider including a read/write element for executing the reading/writing of data, at least one heating element arranged in a width direction of the magnetic head slider with respect to the read/write element for generating heat in response to energization, a thermal expansion transmitting part lying between the heating element and the read/write element for transmitting thermal expansion caused by the heating of the heating element and thereby displacing the read/write element in the width direction, and a thermal displacement restriction limiting part formed in a region covering at least part of the region of the thermal expansion transmitting part for limiting restriction on the displacement in the width direction by the thermal expansion transmitting part;
• a heating control circuit including a phase-lead filter with a property inverse to that of the heating element and controlling and driving the heating element;
• a head support part for supporting the magnetic head slider;
• a voice coil motor for driving the head support part and thereby moving the magnetic head slider relative to the magnetic disk;
• a calculation circuit for calculating a position error of the read/write element with respect to the track based on data read out by the read/write element;
• a coarse movement control circuit for driving the voice coil motor based on the position error of the read/write element;
• and
• a fine movement control circuit for energizing the heating element based on the position error of the read/write element.