PAC Identification of Electric-Nuclear-Quadrupole Interactions in Sm Sesquioxides

M. RENTERIA; L. A: ERRICO; A. G. BIBILONI; K. FREITAG; F. G. REQUEJO

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES

VERLAG Z NATURFORSCH

Lugar: Tübingen; Año: 2000 vol. 55 p. 155 - 160

0932-0784

We present PAC results of the electric-nuclear quadrupole interaction (NQI) at 181Ta located at all the inequivalent cation sites of cubic C-Sm2O3 and monoclinic B-Sm2O3 free of defects. The application of the empirical Cd/Ta correlation found in binary oxides allowed us to correlate the interactions with each site and to identify the single Sm site populated in 111In-implanted B-Sm2O3 experiments. The preferential site occupation of Cd and Ta in B-Samaria is discussed in terms of the ?chemistry? of the probe-atoms.