Potential und Einschränkungen der Messung magnetischer Mikrostrukturen mit einem Faraday-Magnetometer

Translated title of the contribution: Potential and limitations of measuring magnetic microstructures with a Faraday rotation magnetometer

Ruben Piepgras, Sebastian Michlmayr, Johannes Egger, Bernhard Zagar

Research output: Contribution to journalArticlepeer-review

Abstract

Magnetic microstructures can be used to encode information. This information can then be analyzed non-destructively using, e. g. a Faraday Rotation Magnetometer (FRM). An FRM is a magneto-optical setup built around the Faraday effect, which links magnetic field strengths with the rotation of polarized light. In this contribution we first present an acquisition-speed-focused FRM. With the help of this setup it is possible to qualitatively resolve structures of about 60 µm in size. However, it does not allow any meaningful quantitative measurements. Therefore, we built and characterized a generalized setup in order to establish the potential and limitations of an FRM as a quantitative measurement device. We determine the interdependence of amplitude, spatial, and temporal resolution. Afterwards, we present ways to enhance the signal w. r. t. amplitude resolution, i. e. the suitability for quantitative measurements, as well as their detrimental effects on spatial and temporal resolution. Given a set of requirements, this allows for an estimate of feasibility for an FRM as a quantitative measurement device. Furthermore, it helps in the build as well as the selection of components of the magnetometer.
Translated title of the contributionPotential and limitations of measuring magnetic microstructures with a Faraday rotation magnetometer
Original languageGerman (Austria)
Pages (from-to)577–585
Number of pages9
Journaltm - Technisches Messen
Volume86
Issue number10
DOIs
Publication statusPublished - Oct 2019

Fields of science

  • 202012 Electrical measurement technology
  • 202014 Electromagnetism
  • 202036 Sensor systems
  • 202027 Mechatronics
  • 103021 Optics

JKU Focus areas

  • Digital Transformation

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