Work

Tunable magnetic field source for magnetic field imaging microscopy

Year: 2022

Type: article

Abstract: In this work, we present a novel, compact, power efficient and variable magnetic field source design for magnetic field imaging microscopy. The device is based on a pair of diametrically magnetized permanent magnet cylinders with electro-mechanical rotation control and ferrite flux homogenizers. A Hall probe and NV centers in diamond are used to demonstrate a proof of concept of a proposed magnetic field setup and to characterize the homogeneity of the produced magnetic field on a micrometer scale. Numerical simulation results are compared with experimental results showing good agreement of the distribution of the magnetic field in the setup. As a result, a magnetic field source with a tunable field amplitude in the range from 1 mT to 222 mT is demonstrated, achieving a magnetic field homogeneity of 2 ppm/μm or 0.5 μT/μm at 222 mT in a 25 × 25 μm field of view.

Source: Ultramicroscopy

DOI: 10.1016/j.ultramic.2022.113624

Authors: Andris Berzins, Hugo Grube, Reinis Lazda, Marc A. Hannig, Janis Smits, Ilja Fescenko

Institutions: University of Latvia, Leibniz University Hannover, University of New Mexico

Language: English

Topic: Magnetic Field Sensors Techniques

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,330

Funders: Latvijas Zinātnes Padome, European Regional Development Fund