Magnetic recording head and disk device with the same
A magnetic recording head and recording layer technology, applied in the direction of magnetic recording head, magnetic recording, recording head casing/shield, etc., can solve the problem that the high-frequency oscillator is difficult to achieve favorable oscillation
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no. 1 example
[0022] figure 1 shows the internal structure of the HDD with the top cover removed according to the first embodiment, and figure 2 Shows the head in a floating state. Such as figure 1 As shown in , the HDD includes a housing 10. The housing 10 includes a base 10a having the shape of an open-top rectangular box and a top cover (not shown) in the shape of a rectangular plate. The top cover is attached to the base by a plurality of screws to close the top opening of the base. Thus, the housing 10 remains sealed inside and is ventilated to the outside only through the breather filter 26 .
[0023] On the base portion 10a, there are provided a magnetic disk 12 as a recording medium in the form of a disk and a mechanical part. The mechanical part includes: a spindle motor 13 which supports and rotates the magnetic disk 12; a plurality of magnetic heads 33, such as two, which record and read information to and from the magnetic disk 12; A magnetic head 33 is movably supported;...
no. 2 example
[0067] Figure 9 It is a front view of the distal end portion of the magnetic recording head in the HDD according to the second embodiment viewed from the main magnetic pole 60 side. According to this embodiment, the second protrusion 72 forming the magnetic portion is formed in a trapezoidal shape whose shape in the track width direction conforms to the shape of the tapered portion 60 a of the main magnetic pole 60 . The lower end of the second protrusion 72 on the ABS 43 side is in contact with the front-side end surface 62 b of the tail shield 62 . Even when a magnetic portion having such a shape is used, the high-frequency oscillator can be in a good oscillation state and the error rate is improved.
no. 3 example
[0069] Figure 10 is a sectional view along the track center showing the distal end portion of the magnetic recording head in the HDD according to the third embodiment. According to this embodiment, the second protrusion 72 forming the magnetic portion is formed to protrude more toward the main magnetic pole 60 than the first protrusion 70 extends toward the main magnetic pole 60 . Here, the main magnetic pole 60 side of the protruding end of the second protrusion 72 is positioned without being aligned with the oscillation layer 65 c of the spin torque oscillator 65 . In contrast, the second protrusion 72 is positioned between a plane (substantially perpendicular to the recording layer of the recording medium) in which the oscillation layer 65c is provided and the front-side end surface 62b.
[0070] According to the magnetic recording head configuration described above, the magnetic field applied to the spin torque oscillator 65 within the write gap can be further reduced; t...
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