X-ray diffraction studies of multipole ordering in a strongly correlated electron system

Abstract Non-resonant X-ray diffraction based on the intense synchrotron radiation source is demonstrated as a powerful tool for quantitative studies of the multipole ordering in strongly correlated system. The recent results of X-ray diffraction on CeB 6 and Ce 0.7 Pr 0.3 B 6 compounds are reported. A long-range multipole (quadrupole and hexadecapole) ordering is evidenced directly in the unit-cell structure factor of superlattice reflections as a function of the scattering vector q for CeB 6 and Ce 0.7 Pr 0.3 B 6 compounds.