MAGNETIC MEMORY DEVICE, HEAD DRIVE CONTROL DEVICE, AND HEAD DRIVE CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To solve such a problem that, in a magnetic memory device by a conventional micro assist recording method, when a high-frequency magnetic field oscillation element is kept in an operating state in reproducing or seeking information, the information is often lost or rewritten according to external environment.SOLUTION: The magnetic memory device includes: a magnetic recording medium; a microwave assist magnetic recording head having at least recording magnetic poles for generating a recording magnetic field for writing in the magnetic recording medium, and a high-frequency magnetic field oscillation element for generating a high-frequency magnetic field; a magnetic reproduction head for reading information from the magnetic recording medium; signal processing means for processing a signal that the magnetic recording head writes and a signal that the magnetic reproduction head reads; and means for controlling clearance between a high-frequency magnetic field oscillator and the magnetic recording medium. The magnetic high-frequency magnetic field oscillation element is prevented from operating during a time other than a time of recording.