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MA: Fachverband Magnetismus

MA 40: Poster Magnetism II

MA 40.46: Poster

Donnerstag, 30. März 2023, 14:00–16:00, P2/EG

Multifunctional Magneto-Optical Sensing of Temperature and Magnetic Field — •Michael P. Path, Finn Klingbeil, and Jeffrey McCord — Institute of Materials Science, Kiel University, Germany

Measurements of temperature and magnetic field are vital in laboratory and industry settings. We demonstrate multi-functional magneto-optical measurement schemes to relate magnetic and micromagnetic features to temperature and magnetic field using magneto-optical active iron garnet films. The focus lies upon a dual quadrature polarimetric measurement scheme. A calibration free temperature measurement using the relation of the first and third harmonic of the obtained signal during a magnetic sinusoidal excitation of the garnets is presented. Using the domain wall susceptibility a limit of detection of the magnetic field below 14 nT/√Hz is reached. Indirect measurements of current in integrated circuits is demonstrated using spatially resolved magnetic field sensitivity utilizing a direct magneto-optical imaging setup. A connection of field and temperature measurements in magneto-optical imaging is discussed.
We acknowledge the DFG for funding through grant MC 9/20-2.
F. Klingbeil, S.D. Stölting, J. McCord, APL 118, 092403 (2021)