A Tunnel Diode Oscillator for High Sensitivity Broad Temperature Range Susceptibility Measurements

TL;DR

This paper presents a highly sensitive tunnel diode oscillator capable of measuring magnetic susceptibility across a broad temperature range with the added feature of applying electric fields to detect magnetoelectric effects.

Contribution

The work introduces a novel oscillator design that achieves 50 ppb sensitivity over 1.7-100 K and enables electric field application for magnetoelectric studies.

Findings

Achieved 50 ppb sensitivity in susceptibility measurements.

Operates effectively over 1.7-100 K temperature range.

Allows electric field application to explore magnetoelectric effects.

Abstract

We report the design and operation of a versatile tunnel diode oscillator for high sensitivity (50 ppb) measurements of the magnetic susceptibility of samples over a wide temperature range (1.7-100 K) that can be used with a simple liquid helium storage dewar. The design allows for the application of an electric field across the sample to search for magnetoelectric effects.