MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE
First Claim
1. A magnetic recording head, comprising:
- a magnetic pole;
a stacked body includinga first magnetic layer,a second magnetic layer provided between the first magnetic layer and the magnetic pole, andan intermediate layer provided between the first magnetic layer and the second magnetic layer and being nonmagnetic; and
a first nonmagnetic layer provided between the second magnetic layer and the magnetic pole and contacting the magnetic pole and the second magnetic layer,the first magnetic layer having a first thickness and a first saturation magnetic flux density, the first thickness being along a first direction, the first direction being from the second magnetic layer toward the first magnetic layer,the second magnetic layer having a second thickness and a second saturation magnetic flux density, the second thickness being along the first direction,a second product of the second thickness and the second saturation magnetic flux density being larger than a first product of the first thickness and the first saturation magnetic flux density,a first length of the first magnetic layer in a second direction being shorter than a second length of the second magnetic layer in the second direction, the second direction being perpendicular to the first direction,a current flowing from the second magnetic layer toward the first magnetic layer.
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Accused Products
Abstract
According to one embodiment, a magnetic recording head includes a magnetic pole, a stacked body, and a first nonmagnetic layer. The stacked body includes first magnetic layer, a second magnetic layer provided between the first magnetic layer and the magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer and being nonmagnetic. The first nonmagnetic layer is provided between the second magnetic layer and the magnetic pole. A product of a thickness and a saturation magnetic flux density of the second magnetic layer is larger than a product of a thickness and a saturation magnetic flux density of the first magnetic layer. The length of the first magnetic layer is shorter than a length of the second magnetic layer. A current flows from the second magnetic layer toward the first magnetic layer.
80 Citations
20 Claims
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1. A magnetic recording head, comprising:
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a magnetic pole; a stacked body including a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer and being nonmagnetic; and a first nonmagnetic layer provided between the second magnetic layer and the magnetic pole and contacting the magnetic pole and the second magnetic layer, the first magnetic layer having a first thickness and a first saturation magnetic flux density, the first thickness being along a first direction, the first direction being from the second magnetic layer toward the first magnetic layer, the second magnetic layer having a second thickness and a second saturation magnetic flux density, the second thickness being along the first direction, a second product of the second thickness and the second saturation magnetic flux density being larger than a first product of the first thickness and the first saturation magnetic flux density, a first length of the first magnetic layer in a second direction being shorter than a second length of the second magnetic layer in the second direction, the second direction being perpendicular to the first direction, a current flowing from the second magnetic layer toward the first magnetic layer. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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2. A magnetic recording head, comprising:
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a magnetic pole; a shield; a stacked body including a first magnetic layer provided between the magnetic pole and the shield, a second magnetic layer provided between the first magnetic layer and the shield, and an intermediate layer provided between the first magnetic layer and the second magnetic layer and being nonmagnetic; and a first nonmagnetic layer provided between the second magnetic layer and the shield and contacting the shield and the second magnetic layer, the first magnetic layer having a first thickness and a first saturation magnetic flux density, the first thickness being along a first direction, the first direction being from the second magnetic layer toward the first magnetic layer, the second magnetic layer having a second thickness and a second saturation magnetic flux density, the second thickness being along the first direction, a second product of the second thickness and the second saturation magnetic flux density being larger than a first product of the first thickness and the first saturation magnetic flux density, a first length of the first magnetic layer in a second direction being shorter than a second length of the second magnetic layer in the second direction, the second direction being perpendicular to the first direction, a current flowing from the second magnetic layer toward the first magnetic layer. - View Dependent Claims (3)
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18. A magnetic recording and reproducing device, comprising:
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a magnetic recording head, including; a magnetic pole; a stacked body including a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer and being nonmagnetic; and a first nonmagnetic layer provided between the second magnetic layer and the magnetic pole and contacting the magnetic pole and the second magnetic layer, the first magnetic layer having a first thickness and a first saturation magnetic flux density, the first thickness being along a first direction, the first direction being from the second magnetic layer toward the first magnetic layer, the second magnetic layer having a second thickness and a second saturation magnetic flux density, the second thickness being along the first direction, a second product of the second thickness and the second saturation magnetic flux density being larger than a first product of the first thickness and the first saturation magnetic flux density, a first length of the first magnetic layer in a second direction being shorter than a second length of the second magnetic layer in the second direction, the second direction being perpendicular to the first direction, a current flowing from the second magnetic layer toward the first magnetic layer; a magnetic recording medium, information being recorded on the magnetic recording medium by the magnetic head; and a controller configured to flow the current in the stacked body. - View Dependent Claims (19, 20)
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Specification