Microwave phase detection with a magnetic tunnel junction

ORAL

Abstract

A magnetic tunnel junction (MTJ) can detect microwave magnetic field due to the interplay between the ferromagnetic resonance and tunneling magneto resistance. Based on the fact that the tunneling resistance change is quadratically proportional to the rf magnetic field, we have designed a mixing circuit in which two microwaves interfere, giving rising to a dc voltage containing the phase difference between the two microwaves. With ability to detect microwave intensity and phase, the MTJ-based device may be used for on-chip microwave network analyzer and spectrum analyzer.

–

Authors

  • Xin Fan

    Department of Physics and Astronomy, University of Delaware

  • Sangcheol Kim

    Department of Electrical Engineering and Computer Science, University of Delaware

  • Xiaoming Kou

    Department of Physics and Astronomy, University of Delaware, University of Delaware

  • James Kolodzey

    Department of Electrical Engineering and Computer Science, University of Delaware

  • Huaiwu Zhang

    State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China

  • John Xiao

    Department of Physics and Astronomy, University of Delaware, University of Delaware