Detail publikace

Vanadium in yttrium aluminum garnet: Charge states and localization in the lattice

LAGUTA, V. BURYI, M. BEITLEROVÁ, A. LAGUTA, O. NEJEZCHLEB, K. NIKL, M.

Originální název

Vanadium in yttrium aluminum garnet: Charge states and localization in the lattice

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Incorporation of the V3+ and V4+ ions into the yttrium aluminum garnet Y3Al5O12 (YAG) lattice has been studied by the correlated optical absorption and electron paramagnetic resonance (EPR) measurements. Only the V3+ ions at both octahedral and tetrahedral aluminum sites are found in as-grown crystals. However, annealing in air leads to the transformation of the V3+ to V4+, whereas annealing in the hydrogen atmosphere remains the V3+ concentration almost unchanged. Spin Hamiltonian parameters of the V3+ and V4+ ions at the tetrahedral sites including the zero field splitting and (51) V hyperfine constants are determined using high-frequency, up to 300 GHz, EPR measurements. By using the spin Hamiltonian parameters, the ground state energy levels splitting of the V3+ and V4+ ions were calculated in the framework of the crystal field theory. The g and hyperfine tensors suggest that electron density around the tetrahedral V3+ ion is distributed strongly inhomogeneously resulting also in large (40%) reduction of the spin-orbit coupling constant whereas the tetrahedral V4+ ion exhibits weaker covalent bounding with surrounding ligands. Furthermore, the obtained EPR data on vanadium ions allow to improve identification of the optical absorption peaks in YAG:V crystals.

Klíčová slova

Optical materials; Optical properties; Electron spin resonance; Defects

Autoři

LAGUTA, V.; BURYI, M.; BEITLEROVÁ, A.; LAGUTA, O.; NEJEZCHLEB, K.; NIKL, M.

Vydáno

1. 5. 2019

ISSN

1873-1252

Periodikum

OPTICAL MATERIALS

Ročník

91

Číslo

1

Stát

Nizozemsko

Strany od

228

Strany do

234

Strany počet

7

URL

https://www.sciencedirect.com/science/article/pii/S0925346719301867?via%3Dihub

BibTex

@article{BUT159703,
  author="Valentyn {Laguta} and Maksym {Buryi} and Alena {Beitlerová} and Oleksii {Laguta} and Karel {Nejezchleb} and Martin {Nikl}",
  title="Vanadium in yttrium aluminum garnet: Charge states and localization in the lattice",
  journal="OPTICAL MATERIALS",
  year="2019",
  volume="91",
  number="1",
  pages="228--234",
  doi="10.1016/j.optmat.2019.03.024",
  issn="1873-1252",
  url="https://www.sciencedirect.com/science/article/pii/S0925346719301867?via%3Dihub"
}