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Magnetic recording head, and disk device provided with the same

A magnetic recording head and recording medium technology, applied in the direction of magnetic recording head, recording head configuration/installation, magnetic recording, etc., can solve problems such as difficulty in improving linear recording density

Inactive Publication Date: 2015-04-15
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above configuration, the writing gap of the magnetic recording head cannot be made thinner than the total thickness of the spin torque oscillator, and it is difficult to increase the linear recording density.

Method used

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  • Magnetic recording head, and disk device provided with the same
  • Magnetic recording head, and disk device provided with the same
  • Magnetic recording head, and disk device provided with the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ）

[0019] figure 1 The top cover of the HDD related to the first embodiment is removed to show the internal structure, figure 2 It is a magnetic head in a floating state. Such as figure 1 As shown, the HDD includes a casing 10 . The casing 10 includes a rectangular box-shaped base body 10a with an open upper surface and a rectangular plate-shaped top cover (not shown). The top cover is fixed on the base body by a plurality of screws, and closes the upper end opening of the base body. In this way, the inside of the casing 10 is kept airtight, and the air can be ventilated to the outside only through the breathing filter 26 .

[0020] On the base body 10a, a magnetic disk 12 as a recording medium and a mechanism are provided. The mechanism part includes: a spindle motor 13 for supporting and rotating the magnetic disk 12; a plurality of, for example, two magnetic heads 33 for recording and reproducing information on the magnetic disk; a head actuator 14; and a voice coil mot...

no. 2 approach ）

[0061] Figure 7 It is a plan view of the front end portion of the magnetic recording head in the HDD according to the second embodiment viewed from the ABS side.

[0062] According to the second embodiment, the spin torque oscillator 65 is provided in the write gap WG between the front end portion 60 a of the main magnetic pole 60 and the leading edge side end surface 62 c of the trailing edge shield layer 62 . The write shield has a side shield 82 integral with the trailing shield 62 .

[0063] The spin torque oscillator 65 has an oscillation layer 72 , an intermediate layer 74 , a spin injection layer 75 and an interface magnetic layer 76 . The intermediate layer 74 is formed on the trailing edge side end surface 60 c of the main magnetic pole 60 , and its lower end is exposed at the ABS 43 . The oscillation layer 72 and the interface magnetic layer 76 are stacked on the intermediate layer 74, and the spin injection layer 75 is further formed on the interface magnetic lay...

no. 3 approach ）

[0071] Figure 8 It is a top view of the magnetic recording head according to the third embodiment seen from the ABS side.

[0072] According to this embodiment, the recording head 58 of the HDD is a recording head suitable for a magnetic recording head of a single recording (single recording) system.

[0073] Such as Figure 8 As shown, the spin torque oscillator 65 is provided in the write gap WG between the front end portion 60 a of the main magnetic pole 60 and the leading edge side end surface 62 c of the trailing edge shield layer 62 . The write shield has a side shield 82 integral with the trailing shield 62 .

[0074] The spin torque oscillator 65 has an oscillation layer 72 , an intermediate layer 74 , a spin injection layer 75 and an interface magnetic layer 76 . The nonmagnetic intermediate layer 74 is formed on the trailing edge side end surface 60 c of the main magnetic pole 60 , and its lower end is exposed at the ABS 43 . Two oscillation layers 72 and an int...

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Abstract

A recording head of a disk device includes a main magnetic pole, a write shield which faces the main magnetic pole with a write gap interposed therebetween, a coil configured to generate a magnetic field in the main magnetic pole, and a spin torque oscillator which is arranged in the write gap. The spin torque oscillator includes an intermediate layer formed on the main magnetic pole, a field generation layer formed on the intermediate layer, a spin injection layer, and an interface magnetic layer. The field generation layer and the spin injection layer are arranged in parallel to each other in the direction which intersects with the gap length direction of the write gap, and the spin injection layer is electrically connected with the write shield.

Description

[0001] This application is based on and claims priority from Japanese Priority Application No. 2013-207189 (filing date: October 2, 2013). The entire content of this prior application is hereby incorporated by reference. technical field [0002] The embodiments described here relate to a magnetic recording head used for high-frequency assisted recording in a disk device and a disk device including the magnetic recording head. Background technique [0003] As a disk device, for example, the magnetic disk device is provided with: a magnetic disk arranged in a case, a spindle motor supporting and rotating the magnetic disk; a magnetic head for reading and writing information on the magnetic disk; Supported carriage assembly. The configuration of the head of the magnetic head includes a magnetic recording head for writing and a reproducing (reproducing) head for reading. [0004] In recent years, magnetic heads for perpendicular magnetic recording have been proposed in order t...

Claims

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Application Information

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IPC IPC(8): G11B5/127G11B5/48
CPCG11B5/23G11B5/3116G11B2005/0024G11B5/3146G11B5/1278
Inventor 藤田伦仁白鸟聪志杉村忍船山知己
Owner KK TOSHIBA
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