EPR and optical spectroscopy of Yb3+ ions in CaF2 and SrF2

Abstract

The Yb 3+ paramagnetic center of the trigonal symmetry (''oxygen'' paramagnetic center T 2 ) in CaF 2 and SrF 2 single crystals is studied by EPR and optical spectroscopy. The Stark level energies of the Yb 3+ multiplets are established from absorption, luminescence and excitation luminescence spectra and the crystal field parameters are calculated. r

Theoretical investigations of the optical spectra and EPR parameters for Yb3+ ions in GaN epilayer

“…In our case, ζ = 2957 cm −1 for Yb 3+ in GaN is close to the ζ values obtained for other hosts [35][36][37].…”

A unified calculation of the optical spectral band positions and electron paramagnetic resonance spectral data for Yb3+ in InP semiconductor

“…If the covalence of cluster is stronger, the spin-orbit parameter will be smaller. For Yb 3+ ion in crystals, a lot of studies of optical and EPR spectra showed that ≈ 2900 ± 50 cm −1 [9,11,[16][17][18][19][20]. For InP:Yb 3+ , the small spin-orbit parameter (≈2860 cm −1 , which is very close to the value, 2864 cm −1 , obtained by analyzing only the optical spectrum in Ref.…”

“…The spin-orbit parameter for rare earth ions in crystals is nearly a constant and changes slightly from crystal to crystal owing to the different covalence of rare earth clusters in crystals [15][16][17][18]. If the covalence of cluster is stronger, the spin-orbit parameter will be smaller.…”

Crystal field and Zeeman parameters of substitutional Yb3+ ion in GaN

“…The free ion value of spin-orbit coupling constant for the Yb 3+ ion is available in the literature[19]: = 2884 cm −1 .…”