Optically assisted magnetic recording device with semiconductor laser, optically assisted magnetic recording head and magnetic disk device
AssigneeFuji Xerox Co., Ltd.
InventorKiichi Ueyanagi
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Abstract
The present invention provides a magnetooptic device, a magnetooptic head, and a magnetic disk drive each capable of performing optically assisted magnetic recording and each having a small size, improved recording density, and a higher transfer rate. In a magnetooptic device, a magnetic circuit including a magnetic gap and a thin film magnetic transducer having a coil portion are stacked on the surface of a semiconductor laser. By the arrangement, optically assisted magnetic recording can be performed, small size and light weight are achieved, and higher transfer rate can be implemented.
Claims15
A magnetooptic head, comprising:
- a semiconductor laser which emits a laser beam;
- a transparent condensing medium having an incident surface on which the laser beam from the semiconductor laser is incident and a light-receiving surface on which the laser beam incident on the incident surface is condensed to thereby form a beam spot;
- and
- a thin film magnetic transducer including a magnetic circuit having at least two magnetic poles, is the thin film magnetic transducer being stacked directly on the light-receiving surface and defining a magnetic gap between the two magnetic poles of the magnetic circuit, and a coil wound around a core as a component of the magnetic circuit.
A magnetic disk drive, comprising:
- a magnetooptic device having a semiconductor laser which emits a laser beam, a transparent condensing medium including an incident surface on which the laser beam from the semiconductor laser is incident and a light-receiving surface on which the laser beam incident on the incident surface is condensed so as to form a beam spot, and a thin film magnetic transducer including a magnetic circuit having at least two magnetic poles, and which is stacked directly on the light-receiving surface and defines a magnetic gap, and a coil wound around a core, the coil being a component of the magnetic circuit;
- a disk on which a recording medium is formed on the surface;
- a flying slider which holds the magnetooptic device and flies over the recording medium;
- and
- a moving unit which moves the flying slider relative to the disk, wherein the magnetic gap is formed between two magnetic poles of the magnetic circuit.
Dependencies are inferred from the claim text.