PERPENDICULAR MAGNETIC WRITE HEAD AND MAGNETIC RECORDING DEVICE

• US 20110310510A1
• Filed: 06/21/2010
• Published: 12/22/2011
• Est. Priority Date: 06/21/2010
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: ANAGAWA, Kenkichi, Kurihara, Katsuki, Kagami, Takeo, Hirata, Kei, Ota, Minoru
• Granted Patent: US 8,233,237 B2
• Time in Patent Office: Days
• US Class Current: 360/123.12
• CPC Class Codes: G11B 5/1278 specially adapted for magnetisations perpendicular to the surface of the record carrier
• CPC Class Codes: G11B 5/235 Selection of material for gap filler G11B5/232 takes precedence
• CPC Class Codes: G11B 5/3146 magnetic layers
• CPC Class Codes: G11B 5/315 Shield layers on both sides of the main pole, e.g. in perpendicular magnetic heads

Abstract

A main magnetic-pole layer is provided with, at the tip end portion thereof, a trailing shied on the trailing side via a non-magnetic gap layer, and the non-magnetic gap layer includes therein one or more magnetic layers. This magnetic layer appropriately controls the amount of magnetic fluxes coming from the tip end portion of the main magnetic-pole layer for capturing into the trailing shield because the magnetic fluxes coming from the tip end portion of the main magnetic-pole layer go through the magnetic layer before being captured into the trailing shield.

Claims

1. A perpendicular magnetic write head, comprising:

a write shield provided to a magnetic pole via a non-magnetic gap layer, wherein

the non-magnetic gap layer includes therein one or more magnetic layers.

2. The perpendicular magnetic write head according to claim 1, wherein

the write shield is at least any one of a trailing shield provided on a trailing side of the magnetic pole, a leading shield provided on a leading side of the magnetic pole, and a pair of side shields provided respectively on both sides of the magnetic pole in a track-width direction.

3. The perpendicular magnetic write head according to claim 2 further comprising a return yoke coupled to the trailing shield on the trailing side, wherein

the write shield is the trailing shield, and

the trailing shield is formed separately from the return york.

4. The perpendicular magnetic write head according to claim 1, wherein

the magnetic layer is provided at least in an area opposing the magnetic pole.

5. The perpendicular magnetic write head according to claim 1, wherein

a total thickness of the non-magnetic gap layer and the magnetic layer, at a position where the magnetic layer is formed in the non-magnetic gap layer, is 300 nm or smaller.

6. A magnetic recording device, comprising:

a magnetic recording medium and a perpendicular magnetic write head, wherein

the perpendicular magnetic write head includes a write shield provided to a magnetic pole via a non-magnetic gap layer, and

the non-magnetic gap layer includes therein one or more magnetic layers.