Theoretical and experimental study of primary radiation defects in KNbO3 perovskite crystals

E. A. Kotomin; R. I. Eglitis; G. Borstel; L. Grigorjeva; D. Millers; V. Pankratov

doi:10.1016/S0168-583X(99)00668-0

Theoretical and experimental study of primary radiation defects in KNbO₃ perovskite crystals

E. A. Kotomin^*
, R. I. Eglitis
, G. Borstel
, L. Grigorjeva
, D. Millers
, V. Pankratov

^*Corresponding author for this work

Laboratory of Kinetics in Self-Organizing Systems, Institute of Solid State Physics
Laboratory of Computer Modeling of Electronic Structure of Solids, Institute of Solid State Physics
Laboratory of Spectroscopy, Institute of Solid State Physics

Osnabrück University
University of Latvia

Research output: Contribution to journal › Conference article › peer-review

13 Citations (Scopus)

Abstract

The results of large-scale computer simulations of point defects - F-type electron centers and hole polarons bound to a potassium vacancy - in perovskite KNbO₃ crystals are presented. One-site polarons and two-site (molecular) polarons are expected to coexist, both are characterized by close absorption energies around 1 eV. The transient absorption spectra and decay kinetics observed after ns-pulsed electron beam irradiation have been measured for different KNbO₃ crystals. The relaxation kinetics of the optical density vary considerably for different impurity concentrations and sample stoichiometries. Experimental data are discussed in the light of the presented calculations.

Original language	English
Pages (from-to)	299-304
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	166
DOIs	https://doi.org/10.1016/S0168-583X(99)00668-0
Publication status	Published - 2 May 2000
Event	10th International Conference on Radiation Effects in Insulators - Jena, Ger Duration: 18 Jul 1999 → 23 Jul 1999

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10.1016/S0168-583X(99)00668-0

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title = "Theoretical and experimental study of primary radiation defects in KNbO3 perovskite crystals",

abstract = "The results of large-scale computer simulations of point defects - F-type electron centers and hole polarons bound to a potassium vacancy - in perovskite KNbO3 crystals are presented. One-site polarons and two-site (molecular) polarons are expected to coexist, both are characterized by close absorption energies around 1 eV. The transient absorption spectra and decay kinetics observed after ns-pulsed electron beam irradiation have been measured for different KNbO3 crystals. The relaxation kinetics of the optical density vary considerably for different impurity concentrations and sample stoichiometries. Experimental data are discussed in the light of the presented calculations.",

author = "Kotomin, \{E. A.\} and Eglitis, \{R. I.\} and G. Borstel and L. Grigorjeva and D. Millers and V. Pankratov",

year = "2000",

month = may,

day = "2",

doi = "10.1016/S0168-583X(99)00668-0",

language = "English",

volume = "166",

pages = "299--304",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

publisher = "Elsevier B.V.",

note = "10th International Conference on Radiation Effects in Insulators ; Conference date: 18-07-1999 Through 23-07-1999",

}

Theoretical and experimental study of primary radiation defects in KNbO₃ perovskite crystals. / Kotomin, E. A.; Eglitis, R. I.; Borstel, G. et al.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 166, 02.05.2000, p. 299-304.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - Theoretical and experimental study of primary radiation defects in KNbO3 perovskite crystals

AU - Kotomin, E. A.

AU - Eglitis, R. I.

AU - Borstel, G.

AU - Grigorjeva, L.

AU - Millers, D.

AU - Pankratov, V.

PY - 2000/5/2

Y1 - 2000/5/2

N2 - The results of large-scale computer simulations of point defects - F-type electron centers and hole polarons bound to a potassium vacancy - in perovskite KNbO3 crystals are presented. One-site polarons and two-site (molecular) polarons are expected to coexist, both are characterized by close absorption energies around 1 eV. The transient absorption spectra and decay kinetics observed after ns-pulsed electron beam irradiation have been measured for different KNbO3 crystals. The relaxation kinetics of the optical density vary considerably for different impurity concentrations and sample stoichiometries. Experimental data are discussed in the light of the presented calculations.

AB - The results of large-scale computer simulations of point defects - F-type electron centers and hole polarons bound to a potassium vacancy - in perovskite KNbO3 crystals are presented. One-site polarons and two-site (molecular) polarons are expected to coexist, both are characterized by close absorption energies around 1 eV. The transient absorption spectra and decay kinetics observed after ns-pulsed electron beam irradiation have been measured for different KNbO3 crystals. The relaxation kinetics of the optical density vary considerably for different impurity concentrations and sample stoichiometries. Experimental data are discussed in the light of the presented calculations.

UR - https://www.scopus.com/pages/publications/0033746965

U2 - 10.1016/S0168-583X(99)00668-0

DO - 10.1016/S0168-583X(99)00668-0

M3 - Conference article

AN - SCOPUS:0033746965

SN - 0168-583X

VL - 166

SP - 299

EP - 304

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

T2 - 10th International Conference on Radiation Effects in Insulators

Y2 - 18 July 1999 through 23 July 1999

ER -

Theoretical and experimental study of primary radiation defects in KNbO₃ perovskite crystals

Abstract

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