Magnetic recording head and magnetic recording apparatus
First Claim
1. A magnetic recording head comprising:
- a recording magnetic pole; and
a spin oscillation device including a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, and a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer,the first magnetic layer and the second magnetic layer being antiferromagnetically coupled and/or magnetostatically coupled to each other, andthe first magnetic layer and the second magnetic layer being laminated in a direction generally parallel to a medium facing surface and generally parallel to a side surface of the recording magnetic pole intersecting with the medium facing surface.
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Accused Products
Abstract
A magnetic recording head includes a recording magnetic pole, and a spin oscillation device including a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, and a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer. The first magnetic layer and the second magnetic layer are antiferromagnetically coupled and/or magnetostatically coupled to each other. The first magnetic layer and the second magnetic layer are laminated in a direction generally parallel to a medium facing surface and generally parallel to a side surface of the recording magnetic pole intersecting with the medium facing surface.
239 Citations
23 Claims
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1. A magnetic recording head comprising:
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a recording magnetic pole; and a spin oscillation device including a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, and a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer, the first magnetic layer and the second magnetic layer being antiferromagnetically coupled and/or magnetostatically coupled to each other, and the first magnetic layer and the second magnetic layer being laminated in a direction generally parallel to a medium facing surface and generally parallel to a side surface of the recording magnetic pole intersecting with the medium facing surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A magnetic recording head comprising:
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a main magnetic pole; a laminated body in which a first magnetic layer, a second magnetic layer, and an intermediate layer provided between the first magnetic layer and the second magnetic layer are laminated generally perpendicular to a medium travel direction; and a pair of electrodes operable to pass a current through the laminated body. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A magnetic recording apparatus comprising:
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a magnetic recording medium; the magnetic recording head including; a recording magnetic pole; and a spin oscillation device including a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, and a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer, the first magnetic layer and the second magnetic layer being antiferromagnetically coupled and/or magnetostatically coupled to each other, and the first magnetic layer and the second magnetic layer being laminated in a direction generally parallel to a medium facing surface and generally parallel to a side surface of the recording magnetic pole intersecting with the medium facing surface; a moving unit configured to allow relative movement between the magnetic recording medium and the magnetic recording head, which are opposed to each other with a spacing therebetween or in contact with each other; a controller configured to position the magnetic recording head at a prescribed recording position of the magnetic recording medium; and a signal processor configured to perform writing and reading of a signal on the magnetic recording medium by using the magnetic recording head, the oscillation frequency of the spin oscillation device being generally equal to the ferromagnetic resonance frequency of a recording magnetic grain or a recording magnetic dot constituting a recording magnetic layer of the magnetic recording medium. - View Dependent Claims (17, 18)
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19. A magnetic recording apparatus comprising:
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a magnetic recording medium; the magnetic recording head including; a main magnetic pole; a laminated body in which a first magnetic layer, a second magnetic layer, and an intermediate layer provided between the first magnetic layer and the second magnetic layer are laminated generally perpendicular to a medium travel direction; and a pair of electrodes operable to pass a current through the laminated body; a moving unit configured to allow relative movement between the magnetic recording medium and the magnetic recording head, which are opposed to each other with a spacing therebetween or in contact with each other; a controller configured to position the magnetic recording head at a prescribed recording position of the magnetic recording medium; and a signal processor configured to perform writing and reading of a signal on the magnetic recording medium by using the magnetic recording head. - View Dependent Claims (20, 21, 22, 23)
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Specification