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US 8,559,134 B2Granted
Radio frequency magnetic field assisted recording head, head assembly, amd recording apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsKenichiro Yamada, Hitoshi Iwasaki, Katsuhiko Koui
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Abstract
A recording head including a first electrode, a first magnetic layer, a second magnetic layer, a first intermediate layer, a third magnetic layer, a second electrode, and a magnetic pole. A product of saturated magnetization of the first magnetic layer and a lateral area of the first magnetic layer is larger than a product of saturated magnetization of the third magnetic layer and a lateral area of the third magnetic layer.
Claims16
A recording head comprising:
- a first electrode;
- a second electrode;
- a first magnetic layer provided between the first electrode and the second electrode;
- a second magnetic layer provided between the first magnetic layer and the second electrode;
- a first intermediate layer provided between the second magnetic layer and the second electrode;
- a third magnetic layer provided between the first intermediate layer and the second electrode, wherein a product of saturated magnetization of the first magnetic layer and a lateral area of the first magnetic layer is larger than a product of saturated magnetization of the third magnetic layer and a lateral area of the third magnetic layer;
- and
- a magnetic pole provided on a side of the second electrode opposite to a side where the third magnetic layer is provided.
5 more elements
A magnetic head assembly, comprising:
- a head slider;
- a magnetic recording head being installed on the head slider, the magnetic recording head comprising:
- a first electrode;
- a second electrode;
- a first magnetic layer provided between the first electrode and the second electrode;
- a second magnetic layer provided between the first magnetic layer and the second electrode;
- a first intermediate layer provided between the second magnetic layer and the second electrode;
- a third magnetic layer provided between the first intermediate layer and the second electrode, wherein a product of saturated magnetization of the first magnetic layer and a lateral area of the first magnetic layer is larger than a product of saturated magnetization of the third magnetic layer and a lateral area of the third magnetic layer;
- a magnetic pole provided on a side of the second electrode opposite to a side where the third magnetic layer is provided;
- and
- an actuator arm connected to an end of the head slider.
8 more elements
A magnetic recording apparatus, comprising:
- a magnetic recording medium;
- a magnetic head assembly comprising:
- a head slider;
- a magnetic recording head being installed on the head slider, the magnetic recording head comprising:
- a first electrode;
- a second electrode;
- a first magnetic layer provided between the first electrode and the second electrode;
- a second magnetic layer provided between the first magnetic layer and the second electrode;
- a first intermediate layer provided between the second magnetic layer and the second electrode;
- a third magnetic layer provided between the first intermediate layer and the second electrode, wherein a product of saturated magnetization of the first magnetic layer and a lateral area of the first magnetic layer is larger than a product of saturated magnetization of the third magnetic layer and a lateral area of the third magnetic layer;
- a magnetic pole provided on a side of the second electrode opposite to a side where the third magnetic layer is provided;
- and
- an actuator arm connected to an end of the head slider;
- and
- a signal processing unit configured to write and read a signal on the magnetic recording medium using the magnetic recording head installed on the magnetic head assembly.
12 more elements
Dependencies are inferred from the claim text.