Electron spin and paramagnetic resonance in KH₂PO₄ and its isomorphs

Abstract

This paper reviews magnetic resonance of radicals and paramagnetic ions in KH₂PO₄-type crystals up to 1985. In two sections, dedicated to each category of impurities, their site, symmetry and static particularities are summarized. Then the application of spin resonance to monitor fast ferroelectric domain polarization reversal is exposed. Finally, in the last section, slow local re-orientations of certain magnetic defects as well as information on intrinsic soft-mode dynamics from a static defect are described.