Electron spin resonance (ESR) images were obtained by scanning samples over an aperture of a microwave cavity. A spatial resolution of 0.2 mm, which is below both the wavelength of the electromagnetic wave (~3 cm) and the diameter of the aperture (1 mm), was obtained by using a deconvolution algorithm. Resolution of three dots within a 1 mm diameter was demonstrated using a test sample. Microscopic images of spin concentration of Gd3+ impurity before and after deconvolution are shown using a natural single crystal of zircon (ZrSiO4) with a zonal structure. ESR images of Jurassic carbonate fossils of crinoid and ammonite are shown.
Ikeya, M.; Furusawa, M.; and Kasuya, M.
"Near-Field Scanning Electron Spin Resonance Microscopy,"
Scanning Microscopy: Vol. 4
, Article 4.
Available at: https://digitalcommons.usu.edu/microscopy/vol4/iss2/4