Patents by Inventor Hiroko ARAI

Hiroko ARAI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Non-collinear magnetoresistive device
    Patent number: 10388347
    Abstract: Some embodiments are directed to a non-collinear magnetoresistive device, including a free layer; a fixed layer; and a non-magnetic layer disposed between the free layer and the fixed layer, wherein the fixed layer has an easy magnetization direction in an in-plane direction or in a perpendicular direction, the free layer satisfies at room temperature expressions (1) and (2) below: ERT?1.66×10?19 J??(1) V?5×104 nm3??(2) where ERT=(Ku1,eff+Ku2+Ku1,eff2/4Ku2)×V, Ku1,eff: an effective first-order anisotropy constant, Ku2: a second-order anisotropy constant, and V: a volume, and wherein the free layer is in a cone magnetization state.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: August 20, 2019
    Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Rie Matsumoto, Hiroko Arai, Shinji Yuasa, Hiroshi Imamura
  • Magnetoresistive device
    Patent number: 10319902
    Abstract: Some embodiments are directed to a magnetoresistive device, including a free layer having an easy magnetization direction in a perpendicular direction or in an in-plane direction; a fixed layer having the easy magnetization direction which is in the perpendicular direction when the easy magnetization direction of the free layer is in the perpendicular direction or in the in-plane direction when the easy magnetization direction of the free layer is in the in-plane direction; and a non-magnetic layer disposed between the free layer and the fixed layer.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: June 11, 2019
    Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Rie Matsumoto, Hiroko Arai, Shinji Yuasa, Hiroshi Imamura
  • MAGNETORESISTIVE DEVICE
    Publication number: 20180233659
    Abstract: Some embodiments are directed to a magnetoresistive device, including a free layer having an easy magnetization direction in a perpendicular direction or in an in-plane direction; a fixed layer having the easy magnetization direction which is in the perpendicular direction when the easy magnetization direction of the free layer is in the perpendicular direction or in the in-plane direction when the easy magnetization direction of the free layer is in the in-plane direction; and a non-magnetic layer disposed between the free layer and the fixed layer.
    Type: Application
    Filed: February 14, 2018
    Publication date: August 16, 2018
    Inventors: Rie MATSUMOTO, Hiroko ARAI, Shinji YUASA, Hiroshi IMAMURA
  • NON-COLLINEAR MAGNETORESISTIVE DEVICE
    Publication number: 20180151214
    Abstract: A non-collinear magnetoresistive device, includes: a free layer; a fixed layer; and a non-magnetic layer disposed between the free layer and the fixed layer, wherein the fixed layer has an easy magnetization direction in an in-plane direction or in a perpendicular direction, the free layer satisfies at room temperature expressions (1) and (2) below: ERT?1.66×10?19 J??(1) V?5×104 nm3??(2) where ERT=(Ku1,eff+Ku2+Ku1,eff2/4Ku2)×V, Ku1,eff: an effective first-order anisotropy constant, Ku2: a second-order anisotropy constant, and V: a volume, and wherein the free layer is in a cone magnetization state.
    Type: Application
    Filed: May 19, 2016
    Publication date: May 31, 2018
    Inventors: Rie MATSUMOTO, Hiroko ARAI, Shinji YUASA, Hiroshi IMAMURA