Torque Differential Magnetometry Using the Qplus-Mode of a Quartz Tuning Fork

ORAL

Abstract

Quartz tuning fork is the key component of high-resolution atomic force microscope. Because of its high quality factor, quartz tuning fork can also be used for high sensitivity magnetometry. Herein, we developed a highly sensitive torque differential magnetometry using the Qplus-mode of a quartz tuning forks. A sharp resonance of the quartz tuning fork was observed at low temperature down to 25 mK. We calibrated our torque differential magnetometry by measuring the angular dependence of the hysteresis loop in single crystalline Fe0.25TaS2. Furthermore, we demonstrated the high sensitivity and the applicability of our torque differential magnetometry in strong magnetic field by measuring the angular dependent quantum oscillations of bismuth single crystal up to 45 T. The extracted Fermi surface cross sections are consistent with previous results. Extra features beyond the quantum limit was also observed, which corresponds to the Landau spectrum at the extreme field limit.

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Presenters

  • Lu Chen

    • Department of Physics, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Physics, Univ of Michigan - Ann Arbor

Authors

  • Lu Chen

    • Department of Physics, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Physics, Univ of Michigan - Ann Arbor

  • Fan Yu

    • Department of Physics, Univ of Michigan - Ann Arbor

  • Ziji Xiang

    • Department of Physics, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Physics, Univ of Michigan - Ann Arbor

  • Tomoya Asaba

    • Physics, Univ of Michigan - Ann Arbor
    • Department of Physics, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor

  • Colin Tinsman

    • Department of Physics, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Physics, Univ of Michigan - Ann Arbor

  • Benjamin Lawson

    • Department of Physics, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor

  • Paul Sass

    • Department of Physics and Astronomy, Rutgers University
    • Department of Physics and Astronomy, Rutgers, the State College of New Jersey

  • Weida Wu

    • Department of Physics and Astronomy, Rutgers University
    • Rutgers-Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University
    • Rutgers Univ
    • Physics and Astronomy, Rutgers Univ
    • Department of Physics and Astronomy, Rutgers, the State College of New Jersey

  • Xianhui Chen

    • University of Science and Technology of China
    • Department of Physics, University of Science and Technology of China
    • Hefei National Laboratory for Physical Science at Microscale and Department of Physics, University of Science and Technology of China

  • Lu Li

    • Department of Physics, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Physics, Univ of Michigan - Ann Arbor