Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 79: Poster: New Materials
HL 79.8: Poster
Donnerstag, 23. März 2017, 15:00–19:00, P2-OG3
EPR spectroscopy of Yb3+ in lithium yttrium borate (LYB) single crystals — •Sara Arceiz Casas1, Gábor Corradi2, László Kovács2, Éva Tichy-Rács2, and Sigmund Greulich-Weber1 — 1Paderborn University, Warburger Str. 100, 33098 Paderborn, Germany — 2Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege u. 29-33, 1121 Budapest, Hungary
Lithium yttrium borate Li6Y(BO3)3 is an excellent nonlinear optical material with a wide UV range of transparency. Due to the easy incorporation of rare earth ions at Y sites LYB is a prospective laser host material. Yb3+ ions are especially interesting for near-infrared laser pulse applications, indeed, mode-locked and Q-switched laser operation near 1042 nm in Yb-doped LYB has already been realized. EPR studies of Yb+3 in LYB have only been reported in powdered materials. Here single-crystal results on the EPR and its temperature dependence characterizing the Stark-split ground state of Yb+3 in the low symmetry crystal field of LYB are presented.
LYB crystals doped with 1 mol% Yb were grown by the Czochralski method. EPR was measured at low temperature on samples oriented by X-ray diffraction and cut perpendicular to the crystallographic twofold symmetry axis b. Angular dependent EPR spectra near 5K have been taken for the magnetic field in four crystallographic planes required for a full and unambiguous determination of the g-tensor and the hyperfine-tensor of the 171Yb and 173Yb isotopes. The results show reasonable agreement with theoretical results published recently.