Determining the vibrations between sensor and sample in SQUID microscopy

TL;DR

This paper presents a method to measure and analyze the three-dimensional vibrational noise between the sensor and sample in a scanning SQUID microscope, aiding in diagnosing vibrational issues in high-precision microscopy.

Contribution

The paper introduces a technique to determine the spectra of all three components of relative sensor-sample vibrations using noise spectral density measurements.

Findings

Able to determine spectra of all vibration components

Effective in diagnosing vibrational noise

Improves understanding of noise sources in SQUID microscopy

Abstract

Vibrations can cause noise in scanning probe microscopies. Relative vibrations between the scanning sensor and the sample are important but can be more difficult to determine than absolute vibrations or vibrations relative to the laboratory. We measure the noise spectral density in a scanning SQUID microscope as a function of position near a localized source of magnetic field, and show that we can determine the spectra of all three components of the relative sensor-sample vibrations. This method is a powerful tool for diagnosing vibrational noise in scanning microscopies.