MAGNETIC BODY DEVICE AND MANUFACTURING METHOD THEREOF
First Claim
1. A magnetic body device comprising:
- an underlying layer;
a cap layer formed of a material different from that of the underlying layer;
a magnetic body layer in contact at the lower surface with the underlying layer and in contact at the upper surface with the cap layer; and
a pair of current terminals for supplying a current to the underlying layer and the magnetic body layer, whereinthe magnetic body layer hasa free magnetization region having a perpendicular magnetic anisotropy anda first characteristic change region and a second characteristic change region situated on both sides of the free magnetization region in a first in-plane direction,perpendicular magnetic anisotropy of the first characteristic change region and the second characteristic change region is lower than that of the free magnetization region,an external magnetic field containing a component in the first-plane direction is applied to the free magnetization region,the underlying layer hasa first underlying region in contact with the lower surface of the first characteristic change region anda second underlying region in contact with the lower surface of the second characteristic change region, andthe pair of current terminals is coupled to the first underlying region and the second underlying region respectively.
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Abstract
A magnetic body device has a stacked structure comprising an underlying layer, a magnetic body layer, and a cap layer. The material for the underlying layer is different from that for the cap layer. The magnetic body layer has a free magnetization region having perpendicular magnetic anisotropy and a first characteristic change region and a second characteristic change region situated on both sides of the free magnetization region in a first in-plane direction. The perpendicular magnetic anisotropy of the first characteristic change region and the second characteristic change region is at a level lower than that of the free magnetization region. An external magnetic field containing a component in the first in-plane direction is applied to the free magnetization region. Further, a current in the first in-plane direction is supplied to the free magnetization region.
10 Citations
12 Claims
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1. A magnetic body device comprising:
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an underlying layer; a cap layer formed of a material different from that of the underlying layer; a magnetic body layer in contact at the lower surface with the underlying layer and in contact at the upper surface with the cap layer; and a pair of current terminals for supplying a current to the underlying layer and the magnetic body layer, wherein the magnetic body layer has a free magnetization region having a perpendicular magnetic anisotropy and a first characteristic change region and a second characteristic change region situated on both sides of the free magnetization region in a first in-plane direction, perpendicular magnetic anisotropy of the first characteristic change region and the second characteristic change region is lower than that of the free magnetization region, an external magnetic field containing a component in the first-plane direction is applied to the free magnetization region, the underlying layer has a first underlying region in contact with the lower surface of the first characteristic change region and a second underlying region in contact with the lower surface of the second characteristic change region, and the pair of current terminals is coupled to the first underlying region and the second underlying region respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of manufacturing a magnetic body device comprising:
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(A) forming an underlying layer coupled to a pair of current terminals in which the pair of current terminals are spaced apart in a first in-plane direction and coupled to a first underlying region and a second underlying region of the underlying layer respectively, (B) forming a magnetic body layer having perpendicular magnetic anisotropy over the underlying layer in which the magnetic body layer has a first region in contact with the first underlying region, a second region in contact with the second underlying region, and a third region put between the first region and the second region, (C) forming a cap layer over the magnetic body, in which the material for the cap layer is different from the material for the underlying layer, and (D) making the perpendicular magnetic anisotropy of the first region and the second region to a level lower than that of the third region. - View Dependent Claims (10, 11, 12)
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Specification