Cryogenic probe for low-noise, high-frequency electronic measurements

TL;DR

This paper presents a modular cryogenic probe designed for low-noise, high-frequency measurements across various conditions, emphasizing its versatility, low signal loss, and suitability for advanced techniques like NMR.

Contribution

The paper introduces a novel, adaptable cryogenic probe with low transmission loss, enabling precise measurements across a wide range of frequencies, temperatures, and magnetic fields.

Findings

Successful measurement of shot noise in magnetic tunnel junctions

Low transmission and reflection loss across broad frequency range

Enhanced applicability to techniques like NMR

Abstract

The design and performance of a low-noise, modular cryogenic probe, applicable to a wide range of measurements over a broad range of working frequencies, temperatures, and magnetic fields is presented. The design of the probe facilitates the exchange of sample holders and sample-stage amplifiers, which, combined with its characteristic low transmission and reflection loss, make this design suitable for high precision or low sensitivity measurements. The specific example of measuring the shot noise of magnetic tunnel junctions is discussed. We highlight various design characteristics chosen specifically to expand the applicability of the probe to measurement techniques such as nuclear magnetic resonance (NMR).