Patents by Inventor ALASTAIR CHARLIE FISHER

ALASTAIR CHARLIE FISHER 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).

  • Magnetic Josephson junction system
    Patent number: 11342491
    Abstract: One example includes a magnetic Josephson junction (MJJ) system. The system includes a first superconducting material layer and a second superconducting material layer each configured respectively as a galvanic contacts. The system also includes a ferrimagnetic material layer arranged between the first and second superconducting material layers and that is configured to exhibit a fixed net magnetic moment at a predetermined operating temperature of the MJJ system. The system also includes a ferromagnetic material layer arranged between the first and second superconducting material layers and that is configured to exhibit a variable magnetic orientation in response to an applied magnetic field. The MJJ system can be configured to store a binary logical value based on a direction of the variable magnetic orientation of the ferromagnetic material layer. The system further includes a spacer layer arranged between the ferromagnetic and the ferrimagnetic material layers.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: May 24, 2022
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Thomas F. Ambrose, Melissa G. Loving, Alastair Charlie Fisher
  • MAGNETIC JOSEPHSON JUNCTION SYSTEM
    Publication number: 20220102611
    Abstract: One example includes a magnetic Josephson junction (MJJ) system. The system includes a first superconducting material layer and a second superconducting material layer each configured respectively as a galvanic contacts. The system also includes a ferrimagnetic material layer arranged between the first and second superconducting material layers and that is configured to exhibit a fixed net magnetic moment at a predetermined operating temperature of the MJJ system. The system also includes a ferromagnetic material layer arranged between the first and second superconducting material layers and that is configured to exhibit a variable magnetic orientation in response to an applied magnetic field. The MJJ system can be configured to store a binary logical value based on a direction of the variable magnetic orientation of the ferromagnetic material layer. The system further includes a spacer layer arranged between the ferromagnetic and the ferrimagnetic material layers.
    Type: Application
    Filed: September 28, 2020
    Publication date: March 31, 2022
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: THOMAS F. AMBROSE, MELISSA G. LOVING, ALASTAIR CHARLIE FISHER