Quantitative magnetic-moment mapping of a permanent-magnet material by X-ray magnetic circular dichroism nano-spectroscopy
Tetsuro Ueno,
Ai Hashimoto,
Yasuo Takeichi,
Kanta Ono
Affiliations
Tetsuro Ueno
Elements Strategy Initiative Center for Magnetic Materials, Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science, Tsukuba 305-0047, Japan
Ai Hashimoto
Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
Yasuo Takeichi
Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
Kanta Ono
Elements Strategy Initiative Center for Magnetic Materials, Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science, Tsukuba 305-0047, Japan
We demonstrate the quantitative mapping of magnetic moments in a permanent-magnet material by X-ray magnetic circular dichroism nano-spectroscopy. An SmCo5 specimen was prepared from the bulk material by using a micro-fabrication technique. Scanning transmission X-ray microscopy images were obtained around the Sm M4,5 absorption edges. By applying the magneto-optical sum rules to these images, we obtained quantitative maps of the orbital and spin magnetic moments as well as their ratio. We found that the magnitudes of the orbital and spin magnetic moments and their ratio do not depend on thickness of the specimen.
