Patents by Inventor Roy C. Bell

Roy C. Bell 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).

  • Spin-orbit torque devices
    Patent number: 11568909
    Abstract: An example article includes a composite free layer and a conductive channel. The composite free layer includes a high-anisotropy ferromagnetic layer, a non-magnetic transition metal layer adjacent to the high anisotropy ferromagnetic layer, and an ultra-low damping magnetic insulator. The non-magnetic transition metal layer is between the ultra-low damping magnetic insulator and the high-anisotropy ferromagnetic layer. An example spin-orbit torque (SOT) stack may include the example article. Techniques for forming and switching example articles and SOT stacks are described.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: January 31, 2023
    Assignee: Regents of the University of Minnesota
    Inventors: Randall H. Victora, Roy C Bell
  • SPIN-ORBIT TORQUE DEVICES
    Publication number: 20220005516
    Abstract: An example article includes a composite free layer and a conductive channel. The composite free layer includes a high-anisotropy ferromagnetic layer, a non-magnetic transition metal layer adjacent to the high anisotropy ferromagnetic layer, and an ultra-low damping magnetic insulator. The non-magnetic transition metal layer is between the ultra-low damping magnetic insulator and the high-anisotropy ferromagnetic layer. An example spin-orbit torque (SOT) stack may include the example article. Techniques for forming and switching example articles and SOT stacks are described.
    Type: Application
    Filed: September 10, 2021
    Publication date: January 6, 2022
    Inventors: Randall H. Victora, Roy C. Bell
  • Spin-orbit torque devices
    Patent number: 11120856
    Abstract: An example article includes a composite free layer and a conductive channel. The composite free layer includes a high-anisotropy ferromagnetic layer, a non-magnetic transition metal layer adjacent to the high-anisotropy ferromagnetic layer, and an ultra-low damping magnetic insulator. The non-magnetic transition metal layer is between the ultra-low damping magnetic insulator and the high-anisotropy ferromagnetic layer. An example spin-orbit torque (SOT) stack may include the example article. Techniques for forming and switching example articles and SOT stacks are described.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: September 14, 2021
    Assignee: Regents of the University of Minnesota
    Inventors: Randall H. Victora, Roy C. Bell
  • SPIN-ORBIT TORQUE DEVICES
    Publication number: 20190325931
    Abstract: An example article includes a composite free layer and a conductive channel. The composite free layer includes a high-anisotropy ferromagnetic layer, a non-magnetic transition metal layer adjacent to the high-anisotropy ferromagnetic layer, and an ultra-low damping magnetic insulator. The non-magnetic transition metal layer is between the ultra-low damping magnetic insulator and the high-anisotropy ferromagnetic layer. An example spin-orbit torque (SOT) stack may include the example article. Techniques for forming and switching example articles and SOT stacks are described.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Inventors: Randall H. Victora, Roy C. Bell