Development of scanning-type synchrotron radiation Mossbauer microscope using focused X-ray

A scanning-type synchrotron radiation Mossbauer microscope was designed and installed at the nuclear resonance beamline BL11XU of the SPring-8 facility. The focused Mossbauer probe beam (<phi20 mum) is obtained by the combination of a high-resolution monochromator, a multilayer X-ray focusing mirror and a pinhole slit. Using this Mossbauer microscope, we have performed, for the first time, the synchrotron radiation Mossbauer microscopic measurements of nuclear resonant forward scattering from an iron borate single crystal as a function of the sample position. It was found that the observed Mossbauer time spectra depend on the direction of the local hyperfine magnetic field and the local specimen thickness.