Resonant torque differential magnetometry with high frequency quartz oscillators

Author:

Zheng Guoxin1ORCID,Zhang Dechen1,Chen Kuan-Wen1,Singleton John2,Li Lu1ORCID

Affiliation:

1. Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA

2. National High Magnetic Field Laboratory, MS E536, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

Abstract

Sensitive magnetometry has been a powerful probe for investigating quantum materials. Extreme conditions, such as sub-kelvin cryogenic temperatures and ultrahigh magnetic fields, demand further durability for sensitive magnetometry. However, significant mechanical vibrations and rapid magnetic field changes give enormous challenges to conventional magnetometry. This article presents a possible solution to this problem by developing a new magnetometry technique using high-frequency quartz oscillators. The technique takes advantage of the symmetry and geometry of mechanical vibration configurations of standard commercially available MHz quartz oscillators, and the setup keeps the high quality factor resonance with the sample mounted on the oscillator. We further demonstrate the sensitivity of the technique using bismuth single crystals and a Fe0.25TaS2 ferromagnetic material. Quantum oscillations are observed in the magnetometry response below 1 T, and the detected oscillation frequency is shown to come from the electron pockets of the bismuth.

Funder

U.S. Department of Energy

National Science Foundation

Publisher

AIP Publishing

Subject

Instrumentation

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