Magnetic recording apparatus

Abstract

The invention relates to a magnetic recording apparatus which can realize high recording density. The magnetic recording apparatus is provided with components of a magnetic disk with a magnetic recording layer with coercive force higher than 5.2 kOe, and a recording head (58) which writes magnetic data on the magnetic recording layer. The recording head is provided with a main magnetic pole (60) with width of 40-55nm in a magnetic path width direction, a write shielding member (62) which faces the main magnetic pole in a manner of being separated by a write gap (WG) of 16-18.5nm, and a magnetic flux control layer (80) which is arranged between the main magnetic pole and the write shielding manner in the write gap. The magnetic flux control layer is provided with components of a first control layer (80a) which is formed by a metal layer; a second control layer (80b) which is formed by a random one in magnetic metal and a soft magnetic metal alloy and is laminated on the first control layer; and a third control layer (80c) which is formed by at least one selected from Ta, Ru, Pt, W and Mo or the alloy containing at least one member and is laminated on the second control layer.

Description

[0001] This application claims the priority of the earlier application with Japanese Patent Application No. 2017-243988 (filing date: December 20, 2017). This application incorporates the entire content of the earlier application by referring to this earlier application. technical field [0002] Embodiments of the present invention relate to a magnetic recording device having a magnetic recording head. Background technique [0003] As a disk device, a magnetic disk drive includes a magnetic disk which is a disk-shaped recording medium arranged in a casing, and a magnetic head for reading and writing information on the magnetic disk. The magnetic head includes, for example, a recording head and a reproducing head (reproducing element). The recording head has a main magnetic pole that generates a recording magnetic field, and a write shield and side shields that face each other across a gap between the main magnetic poles. [0004] In recent years, the coercive force (coerci...

AI Technical Summary

Problems solved by technology

As a method of increasing the recording density, it is conceivable to widen the writing gap length (writing gap length) of the recording head, but if the writing gap length is widened, the recording resolution will decrease and the density will be lost.

And, although the recording density can be improved by narrowing the writing gap length, on the other hand, the magnetic field strength decreases

As mentioned above, in order to increase the recording density, it is necessary to increase the coercive force of the recording medium, and the reduction of the magnetic field strength due to the narrowing of the writing gap of the recording head becomes a problem.

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