Ground and excited states of iron centers in ZnO: pulse-EPR and magneto-optical spectroscopy

0451734 - FZÚ 2016 RIV US eng J - Journal Article
Azamat, Dmitry - Debus, J. - Yakovlev, D.R. - Ivanov, V.Yu. - Godlewski, M. - Fanciulli, M. - Bayer, M.
Ground and excited states of iron centers in ZnO: pulse-EPR and magneto-optical spectroscopy.
Physical Review. B. Roč. 92, č. 19 (2015), "195202-1"-"195202-9". ISSN 1098-0121
R&D Projects: GA ČR(CZ) GAP108/11/0958; GA MŠMT(CZ) LM2011029
Institutional support: RVO:68378271
Keywords : paramagnetic-resonance * transient nutations * decay * Fe * oscillations * solids * oxide * ions
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.736, year: 2014

We report on the ground- and excited-state properties of Fe3+ centers in hydrothermally and chemical-vapor-transport grown single ZnO crystals studied by continuous-wave electron-paramagnetic resonance (EPR) under dark and laser-illuminated conditions, pulsed-EPR and magneto-photoluminescence. By use of EPR experiments, the fine-structure parameters of the Fe3+ spin Hamiltonian are determined. Three types of charge-compensated Fe3+ centers are identified and the charge conversion from Fe2+ to Fe3+ is highlighted. The magneto-optical studies of the Zeeman components of the spin-forbidden electric-dipole transitions from excited 4T1(G) to ground 6 A1(6S) states of the Fe3+ center indicate the trigonal symmetry of the fine structure of the lowest Γ8(4T1) excited state.
Permanent Link: http://hdl.handle.net/11104/0252839