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US 2003/0197987 A1Published application
CPP magnetic sensing element
AssigneeAlps Electric Co., Ltd.
InventorMasamichi Saito
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AssigneeAlps Electric Co., Ltd.
InventorMasamichi Saito
Estimating the term…
In a CPP magnetic sensing element, a free magnetic layer has a laminated ferrimagnetic structure. Since the physical thickness of the free magnetic layer is increased, the product of a change in resistance AR and an area A can be improved and read output can be improved. Since the magnetic thickness is decreased, the demagnetizing field of the free magnetic layer is weakened, and it is possible to stably apply a continuous bias with a proper magnitude from the second antiferromagnetic layer to the first free magnetic sublayer. Therefore, it is possible to fabricate a magnetic sensing element with satisfactory read sensitivity
A magnetic sensing element comprising a multilayer film comprising:
Dependencies are inferred from the claim text.
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Magnetoresistive devices: using multilayer structures, e.g. giant magnetoresistance sensors
Nanotechnology for information processing, storage or transmission
Nanomagnetism
Using magneto-resistive devices or effects: using magnetic thin film layers or their effects, the films being part of integrated structures
Term end not estimated
1. Field of the Invention
The present invention relates to current-perpendicular-to-the-plane (CPP) magnetic sensing elements and, more particularly, to a magnetic sensing element in which read sensitivity and read output can be improved even when the track is narrowed.
2. Description of the Related Art
FIG. 1 is a partial sectional view of a CPP magnetic sensing element in a first embodiment of the present invention, viewed from the surface facing a recording medium;
FIG. 2 is a partial sectional view of a CPP magnetic sensing element in a second embodiment of the present invention, viewed from the surface facing a recording medium;
FIG. 3 is a partial sectional view of a CPP magnetic sensing element in a third embodiment of the present invention, viewed from the surface facing a recording medium;
FIG. 1 is a partial sectional view which shows an overall structure of a magnetic sensing element in a first embodiment of the present invention, viewed from the surface facing a recording medium. In FIG. 1, only the central part of the element is shown.
The magnetic sensing element shown in FIG. 1 reads the signals written in the recording medium. Although not shown in the drawing, an inductive head for writing may be deposited on the magnetic sensing element.
The magnetic sensing element is formed on the trailing end of a slider, for example, composed of alumina-titanium carbide (Al2O3-TiC). The slider is connected to an elastically deformable support composed of a stainless steel or the like at a surface opposite to the surface facing the recording medium, and thus a magnetic head device is produced.