HYPERFINE INTERACTION IN THE LOWEST LEVELS OF THE H-3(4) AND D-1(2) STATES OF TRIVALENT PRASEODYMIUM IN YTTRIUM ALUMINUM PEROVSKITE (YAIO3)

The hyperfine interaction in the lowest levels of the H43 and D21 states of praseodymium in yttrium aluminum perovskite has been measured. The ground-state (H43) measurements were made using a rf optical technique. The excited-state (D21) measurements were made using an enhanced and saturated absorption method. The energy-level separations, spin-Hamiltonian parameters, ground-state magnetic splitting factor and orientation, and the ground-state linewidths are reported. The crystal-field splittings of the H43 and D21 manifolds were measured. © 1979 The American Physical Society.