Patents by Inventor Yiou ZHANG

Yiou ZHANG 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 gradiometer based on magnetic tunnel junctions in magnetic vortex state (vortex MTJ)
    Patent number: 12241865
    Abstract: A magnetic gradiometer can be used in systems or methods for nondestructive testing, even when the material being tested is weakly magnetic. The magnetic gradiometer can include a printed circuit board (PCB) comprising a first end and a second end separated by a base length; an excitation coil encircling at least a portion of the PCB and configured to deliver an alternating current (AC) to generate an excitation magnetic field; and a differential sensor. The differential sensor can include a reference magnetic tunneling junction in magnetic vortex state (vortex MTJ) sensor array at the first end to generate a voltage based on the excitation magnetic field; and a signal vortex MTJ sensor array at the second end to generate another voltage based on the excitation magnetic field due to a composition of the measurement target. The second end of the PCB can be oriented towards the measurement target.
    Type: Grant
    Filed: August 4, 2021
    Date of Patent: March 4, 2025
    Assignees: BROWN UNIVERSITY, KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Gang Xiao, Guanyang He, Yiou Zhang, Xixiang Zhang
  • MAGNETIC GRADIOMETER BASED ON MAGNETIC TUNNEL JUNCTIONS IN MAGNETIC VORTEX STATE (VORTEX MTJ)
    Publication number: 20230333057
    Abstract: A magnetic gradiometer can be used in systems or methods for nondestructive testing, even when the material being tested is weakly magnetic. The magnetic gradiometer can include a printed circuit board (PCB) comprising a first end and a second end separated by a base length; an excitation coil encircling at least a portion of the PCB and configured to deliver an alternating current (AC) to generate an excitation magnetic field; and a differential sensor. The differential sensor can include a reference magnetic tunneling junction in magnetic vortex state (vortex MTJ) sensor array at the first end to generate a voltage based on the excitation magnetic field; and a signal vortex MTJ sensor array at the second end to generate another voltage based on the excitation magnetic field due to a composition of the measurement target. The second end of the PCB can be oriented towards the measurement target.
    Type: Application
    Filed: August 4, 2021
    Publication date: October 19, 2023
    Inventors: Gang Xiao, Guanyang He, Yiou Zhang, Xixiang Zhang
  • Magnetic sensing devices based on interlayer exchange-coupled magnetic thin films
    Patent number: 11500042
    Abstract: A magnetic sensing device includes a non-magnetic layer serving as a spacer and two magnetic layers that sandwich the spacer, and two oxide layers that sandwich the trilayer structure including the two magnetic layers and the spacer.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: November 15, 2022
    Assignee: Brown University
    Inventors: Gang Xiao, Kang Wang, Yiou Zhang
  • MAGNETIC SENSING DEVICES BASED ON INTERLAYER EXCHANGE-COUPLED MAGNETIC THIN FILMS
    Publication number: 20210270914
    Abstract: A magnetic sensing device includes a non-magnetic layer serving as a spacer and two magnetic layers that sandwich the spacer, and two oxide layers that sandwich the trilayer structure including the two magnetic layers and the spacer.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 2, 2021
    Inventors: Gang XIAO, Kang WANG, Yiou ZHANG