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Related Experiment Video

Updated: Jun 7, 2026

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
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Current sensing using bismuth rare-earth iron garnet films.

M Ko, E Garmire

    Applied Optics
    |November 2, 2010
    PubMed
    Summary

    Ferrimagnetic iron garnet films can measure electric current using the Faraday effect and polarized diffraction from magnetic domains. This novel approach offers a new method for precise current sensing applications.

    Area of Science:

    • Materials Science
    • Condensed Matter Physics
    • Optoelectronics

    Background:

    • Ferrimagnetic iron garnet films exhibit unique magneto-optical properties.
    • Current sensing typically relies on resistive or Hall effect-based methods.

    Purpose of the Study:

    • To investigate ferrimagnetic iron garnet films as novel current-sensing elements.
    • To explore the application of the Faraday effect and polarized diffraction for current measurement.

    Main Methods:

    • Utilized the Faraday effect for polarimetric measurement of magnetic fields and currents.
    • Observed and analyzed polarized diffraction patterns arising from magnetic domains.
    • Developed a physical model and mathematical analysis to interpret diffraction phenomena.

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    Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
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    Last Updated: Jun 7, 2026

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    Published on: January 16, 2020

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    10:19

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    Published on: September 27, 2018

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    06:49

    Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates

    Published on: April 12, 2019

    Main Results:

    • Demonstrated a direct correlation between current and observable diffraction patterns.
    • Mathematical analysis showed good agreement with experimental observations.
    • Successfully demonstrated a current sensing method based on polarized diffraction.

    Conclusions:

    • Ferrimagnetic iron garnet films are viable for current sensing applications.
    • Polarized diffraction offers a new pathway for magneto-optical current sensing.
    • The developed model accurately describes the observed diffraction phenomena.