Araujo, JP × Wahl, Ulrich Alves, E Correia, JG Monteiro, T Soares, J Boemare, C #
North-Holland Physics Pub.
Nuclear Instruments & Methods in Physics Research B vol:191 pages:317-322
We report on the lattice location of Er in SrTiO3 single crystals using the emission channeling technique. The angular distribution of conversion electrons emitted from Er-167m (T-1/2 = 2.27 s) was monitored with a position-sensitive detector following the room-temperature 60 keV implantation of the precursor isotope Tm-167 (T-1/2 = 9.25 d) to a dose of 2 x 10(12) at./cm(2). The results for the sample annealed in vacuum at 610 degreesC for 15 min provide direct evidence that Er occupies both Sr and Ti substitutional lattice sites. In addition, thermal recovery of lattice damage was also studied with Rutherford backscattering/channeling for SrTiO3 implanted to doses of 5 x 10(14) and 5 x 10(15) Er/cm(2). We further comment on preliminary photoluminescence results from these samples. (C) 2002 Elsevier Science B.V. All rights reserved.