A magneto-optical microscope for quantitative measurement of magnetic microstructures
Abstract
An optical system is presented to quantitatively map the stray magnetic fields of microscale magnetic structures, with field resolution down to 50 μT and spatial resolution down to 4 μm. The system uses a magneto-optical indicator film (MOIF) in conjunction with an upright reflective polarizing light microscope to generate optical images of the magnetic field perpendicular to the image plane. A novel single light path construction and discrete multi-image polarimetry processing method are used to extract quantitative areal field measurements from the optical images. The integrated system including the equipment, image analysis software, and experimental methods are described. MOIFs with three different magnetic field ranges are calibrated, and the entire system is validated by measurement of the field patterns from two calibration samples.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 01, 2015
- Source ID
- 10.1063/1.4930178
Entities
People
- D. P. Arnold
- E. E. Shorman
- Nicolas Garraud
- W. C. Patterson
Organizations
- Defense Advanced Research Projects Agency
- United States Army Research Laboratory
- University of Florida