An all-electrical torque differential magnetometer operating under ambient conditions

TL;DR

This paper presents an all-electrical torque differential magnetometer using piezoelectric quartz tuning forks, capable of operation under ambient conditions, with high sensitivity and broad specimen mass range, suitable for easy integration in various experimental setups.

Contribution

The development of a simple, all-electrical torque magnetometer that operates under ambient conditions and accommodates larger specimen masses without sensitivity loss.

Findings

Measured uniaxial magnetic anisotropy of iron wire with high SNR

Operates effectively under ambient conditions and low temperatures

Compatible with integration into other experimental setups

Abstract

An all-electrical torque differential magnetometry (also known as cantilever magnetometry) setup employing piezoelectric quartz tuning forks is demonstrated. The magnetometer can be operated under ambient conditions as well as low temperatures and pressures. It extends the allowed specimen mass range up to several 10 $\mu$g without any significant reduction in the sensitivity. Operation under ambient conditions and a simple all-electrical design of the magnetometer should allow for an easy integration with other experimental setups. The uniaxial magnetic anisotropy of a 25 $\mu$m diameter iron wire, measured under ambient conditions with a high signal to noise ratio, was found to be in good agreement with its literature value. Further applications of the technique are discussed.