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Magnetic storage element, magnetic storage device, magnetic memory, and driving method

  • US 9,153,340 B2
  • Filed: 11/15/2013
  • Issued: 10/06/2015
  • Est. Priority Date: 11/20/2012
  • Status: Active Grant
First Claim
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1. A magnetic storage element comprising:

  • a magnetic nanowire including a magnetic domain and a domain wall;

    a pair of electrodes configured to apply current to the magnetic nanowire for shifting the domain wall, the pair of electrodes being connected to the magnetic nanowire, the current flowing in a first direction in which the magnetic nanowire extends;

    a writing unit configured to write magnetization information into the magnetic domain, the writing unit being connected to the magnetic nanowire; and

    a reading unit configured to read the magnetization information from the magnetic domain, the reading unit being connected to the magnetic nanowire,whereinthe magnetic nanowire has a magnetization direction perpendicular to the first direction in which the magnetic nanowire extends,a cross-section of the magnetic nanowire taken along a plane determined by the first direction and a second direction perpendicular to the first direction has first and second visible outlines,the first visible outline has a first minimal point at which a distance from a virtual straight line parallel to the first direction becomes minimal, a second minimal point at which the distance from the virtual straight line becomes minimal, and a first maximal point at which the distance from the virtual straight line becomes longest between the first minimal point and the second minimal point, the second minimal point being different from the first minimal point, the virtual straight line being located inside the magnetic nanowire, andan angle between a first straight line connecting the first minimal point and the second minimal point, and one of a second straight line connecting the first minimal point and the first maximal point and a third straight line connecting the second minimal point and the first maximal point is not smaller than four degrees and not larger than 30 degrees.

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