| 摘要 |
An object is to provide an information recording and playback apparatus that is capable of reducing, as much as possible, reading and writing errors caused by magnetic leakage flux on the inner peripheral side of a magnetic disk. An information recording and playback apparatus 1 includes a rotor R rotatably holding a magnetic disk 60 and being provided with a permanent magnet 51 on the outer peripheral surface; a stator core 3 fixed to a base member 2, the stator core 3 protruding to the inner side in the radial direction in such a manner as to oppose the permanent magnet 51, the stator core 3 including a plurality of stator poles 3a around which coils 3b are wound; a shield plate 70 disposed between the magnetic disk 60 and the stator core 3 in such a manner as to cover the stator core 3 and to have a small gap 62 between the rotating body R, the shielding plate 70 blocking magnetic flux from the permanent magnet 51 and the stator core 3; and a magnetic head 61 for carrying out recording and playback of the magnetic disk 60 by moving forward and backward between the shield plate 70 and the magnetic disk 60. The magnetic head 61 moves forward and backward on the stator poles 3a.
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