Speaker
Przemyslaw Imielski
(Freie Universität Berlin)
Description
The valences of isolated Eu impurities at Pd surfaces and in ZnO semiconductor
crystals are intended to be determined from the oscillation patterns of the
perturbed angular correlation technique. After the production and the
implantation of appropiate precursor isotopes, the 11/2-isomeric levels in Eu-
149 and Eu-147 have been utilized. After annealing procedures, first successful
measurements could be done to determine the quadrupolar interactions of Eu
in the top layer of a Pd single crystal and in non-cubic ZnO. Applying an external
magnetic field in addition, the measured combined interactions are found to be
in agreement with the assumption of bivalent Eu in ZnO.
Author
Przemyslaw Imielski
(Freie Universität Berlin)
Co-authors
William Brewer
(Freie Universität Berlin)
Wolf-Dietrich Zeitz
(Hahn-Meitner-Institut)
Yuriy Manzhur
(Hahn-Meitner-Institut)
