Patent ID: 8518562
Filing Date: 2013-08-27
Classification: G11B,G11C,Y10T

Abstract:
1. A magnetic storage device comprising: a substrate; a first wiring provided over the substrate and having a portion extended along a first axis when the first axis is taken as a central axis; a second wiring provided over the substrate, having a portion extended along a second axis crossing the first axis when the second axis is taken as a central axis, and crossing the first wiring with a gap in-between in a direction of a thickness of the substrate; a recording layer having a planar shape, arranged so that at least part thereof is sandwiched between the first wiring and the second wiring in an area where the first wiring and the second wiring cross each other with the gap in-between, having an easy axis of magnetization, and having a magnetization direction thereof changed by a synthetic magnetic field of a magnetic field arising from the first wiring and a magnetic field arising from the second wiring; a first nonmagnetic film provided over the recording layer; and an anchoring layer provided over the first nonmagnetic film, wherein the anchoring layer includes: a first ferromagnetic film provided over the first nonmagnetic film and having a first magnetization and a first film thickness; a second nonmagnetic film provided over the first ferromagnetic film; a second ferromagnetic film provided over the second nonmagnetic film, coupled in antiparallel with the first ferromagnetic film, and having a second magnetization and a second film thickness; and an antiferromagnetic film provided over the second ferromagnetic film, and wherein a sum of a product of the first magnetization and the first film thickness and a product of the second magnetization and the second film thickness is smaller than a product of the magnetization of the recording layer and the film thickness of the recording layer, wherein the product of the first magnetization and the first film thickness is smaller than the product of the second magnetization and the second film thickness, and wherein the planar shape of the recording layer is asymmetric with respect to a direction of the easy axis of magnetization.