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HL: Fachverband Halbleiterphysik

HL 45: ZnO II

HL 45.5: Vortrag

Donnerstag, 29. März 2007, 15:00–15:15, H17

Electronic Structure of Europium Impiurities in ZnO — •Przemyslaw Imielski¹, William Brewer¹, Yuriy Manzhur², Kay Potzger³, and Wolf Zeitz² — ¹Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany — ²Bereich Strukturforschung, Hahn-Meitner-Institut Berlin GmbH, D-14091 Berlin, Germany — ³Institute of Ion Beam Physics and Materials Research, Forschungszentrum Rossendorf, P.O. Box 510119, 01314 Dresden, Germany

Utilizing peturbed angular correlation spectroskopy (PAC), the behaviour of isolated europium impurities in ZnO has been investigated. The radioactive probe rare earth atoms 149Gd/149Eu were produced and recoil implanted by nuclear reactions. After annealing at 500 degree Celsius, the first spectrum of a 149Eu(11/2-) quadrupolar interaction has been measured. From spectra of the combined interaction, evidence for the realization of the Eu2+(7/2) ground state has been found.