Magnetic storage device
AssigneeTDK Corporation
InventorSusumu Haratani
Life of this patent
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Abstract
A magnetic storage device includes a magnetoresistive element. A pair of side faces of the magnetoresistive element are at least partially opposed to end faces of a pair of open ends of a magnetic yoke. Moreover, the pair of side faces of the magnetoresistive element and the end faces of the pair of open ends of the magnetic yoke have predetermined angles, respectively. Thus, the magnetic storage device can reduce writing current while the magnetic storage device has a small and simple structure.
Claims19
A magnetic storage device comprising a plurality of storage areas each of which comprises:
- a magnetoresistive element having a sensitive magnetic layer in which a magnetizing direction is changed by an external magnetic field;
- a wiring for providing the external magnetic field to the sensitive magnetic layer by a writing current;
- and
- an approximately annular magnetic yoke having at least a pair of open ends opposed to each other with a gap interposed therebetween, the magnetic yoke being arranged to surround an outer circumference of the wiring at a portion in an extending direction of the wiring, wherein
- a pair of side faces of the magnetoresistive element are at least partially opposed to end faces of the pair of open ends of the magnetic yoke, respectively,
- at least a part of the pair of side faces of the magnetoresistive element and the end faces of the pair of open ends of the magnetic yoke have predetermined inclination angles, respectively, and
- the inclination angles of at least a part of the pair of side faces of the magnetoresistive element and the end faces of the pair of open ends of the magnetic yoke are set to be equal to or larger than 20 degrees and smaller than 90 degrees.
A magnetic storage device comprising a plurality of storage areas each of which comprises:
- a magnetoresistive element having a sensitive magnetic layer in which a magnetizing direction is changed by an external magnetic field;
- a wiring for providing the external magnetic field to the sensitive magnetic layer by a writing current;
- and
- an approximately annular magnetic yoke having at least a pair of open ends opposed to each other with a gap interposed therebetween, the magnetic yoke being arranged to surround an outer circumference of the wiring at a portion in an extending direction of the wiring, wherein
- a pair of side faces of the magnetoresistive element are at least partially opposed to end faces of the pair of open ends of the magnetic yoke, respectively, and
- a cross-sectional shape in a diameter direction of the magnetic yoke is approximately round or oval.
A magnetic storage device comprising a plurality of storage areas each of which comprises:
- a magnetoresistive element having a sensitive magnetic layer in which a magnetizing direction is changed by an external magnetic field;
- a wiring for providing the external magnetic field to the sensitive magnetic layer by a writing current;
- and
- an approximately annular magnetic yoke having at least a pair of open ends opposed to each other with a gap interposed therebetween, the magnetic yoke being arranged to surround an outer circumference of the wiring at a portion in an extending direction of the wiring, wherein
- a pair of side faces of the magnetoresistive element are at least partially opposed to end faces of the pair of open ends of the magnetic yoke, respectively, and
- an orientation of magnetic field lines inside the magnetic yoke near the pair of open ends of the magnetic yoke is approximately coincident with an orientation of an axis of easy magnetization of the magnetoresistive element.
Dependencies are inferred from the claim text.