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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:41 |
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Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
Study of ground multiplet of Nd3+ in PbWO4 single-cristals
By mutifrequency EPR spectroscopy
Authors:
F.F. Popescu1, V.Bercu1, J.N.Barascu1, M. Martinelli2, C.A.Massa2, L.A.Pardi2, M.Stefan3, S.V.Nistor3, M.Nikl4, P. Bohacek4.
Affiliation:
1. Department of Physics, University of Bucharest, Magurele, RO-077125, Bucharest, Romania.
2. IPCF-CNR, via G.Moruzzi 1, I-56124 Pisa, Italy.
3. National Institute for Materials Physics, POB MG-7 Magurele, RO-077125, Bucharest,
Romania.
4.Institute of Physics AS CR, Cukrovarnicka 10, CZ-16200 Prague 6, Czech Republic.
E-mail
vbercu@gmail.com
Keywords:
crystal field splitting, EPR
Abstract:
A multifrequency Electron Paramagnetic Resonance (EPR) investigation of Nd3+ impurities in PbWO4 (PWO) single-crystals at the conventional microwave (CMF) frequency 9.43 GHz, and at the 95, 190 and 285 GHz high frequencies (HF) was carried out. The resulting spectra are well described at all frequencies by an axial spin-Hamiltonian (SH) corresponding to an effective electron spin of one-half and to a tetragonal symmetry. We show that from the combined analysis of the multifrequency CMF and HF − EPR spectra and of the optical data, an accurate description of the ground multiplet of the Kramers rare earth ions in solid matrices can be derived.
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