Electron paramagnetic resonance (EPR), electron-nuclear double resonance (ENDOR), and thermoluminescence (TL) are used to characterize the primary electron and hole trapping centers in a lithium tetraborate (Li2B4O7) crystal doped with Ag. Three defects, two holelike and one electronlike, are observed after exposure at room temperature to 60 kV x-rays. The as-grown crystal contains both interstitial Ag+ ions and Ag+ ions substituting for Li+ ions. During the irradiation, substitutional Ag+ ions (4d10) trap holes and two distinct Ag2+ centers (4d9) are formed. These Ag2+ EPR spectra consist of doublets (i.e., the individual 107Ag and 109Ag hyperfine lines are not resolved). One of these hole centers is an isolated unperturbed Ag2+ ion and the other is a Ag2+ ion with a nearby perturbing defect. EPR and ENDOR angular-dependence data provide the g matrix and the 107Ag and 109Ag hyperfine matrices for the more intense isolated hole center. In contrast, the electronlike EPR spectrum produced during the irradiation exhibits large nearly isotropic hyperfine interactions with 107Ag and 109Ag nuclei and a neighboring I = 3/2 nucleus (either 7Li or 11B). This spectrum is assigned to a trapped electron shared between an interstitial Ag ion and the substitutional I = 3/2 ion. Upon warming, the radiation-induced trapped electrons and holes seen with EPR recombine between 100 and 200 °C, in agreement with a single strong TL peak observed near 160 °C.
Skip Nav Destination
Article navigation
1 November 2011
Research Article|
November 10 2011
Electron and hole traps in Ag-doped lithium tetraborate (Li2B4O7) crystals
A. T. Brant;
A. T. Brant
1Department of Physics,
West Virginia University
, Morgantown, West Virginia 26506, USA
Search for other works by this author on:
B. E. Kananan;
B. E. Kananan
2Department of Engineering Physics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio 45433,
USA
Search for other works by this author on:
M. K. Murari;
M. K. Murari
3Department of Geology,
University of Cincinnati
, Cincinnati, Ohio 45221, USA
Search for other works by this author on:
J. W. McClory;
J. W. McClory
a)
2Department of Engineering Physics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio 45433,
USA
Search for other works by this author on:
J. C. Petrosky;
J. C. Petrosky
2Department of Engineering Physics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio 45433,
USA
Search for other works by this author on:
V. T. Adamiv;
V. T. Adamiv
4Institute of Physical Optics, 23 Dragomanov St., Lviv 79005,
Ukraine
Search for other works by this author on:
Ya. V. Burak;
Ya. V. Burak
4Institute of Physical Optics, 23 Dragomanov St., Lviv 79005,
Ukraine
Search for other works by this author on:
P. A. Dowben;
P. A. Dowben
5Department of Physics and Astronomy, Nebraska Center for Materials and Nanoscience,
University of Nebraska
, Lincoln, Nebraska 68588, USA
Search for other works by this author on:
L. E. Halliburton
L. E. Halliburton
1Department of Physics,
West Virginia University
, Morgantown, West Virginia 26506, USA
Search for other works by this author on:
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
J. Appl. Phys. 110, 093719 (2011)
Article history
Received:
August 17 2011
Accepted:
September 28 2011
Citation
A. T. Brant, B. E. Kananan, M. K. Murari, J. W. McClory, J. C. Petrosky, V. T. Adamiv, Ya. V. Burak, P. A. Dowben, L. E. Halliburton; Electron and hole traps in Ag-doped lithium tetraborate (Li2B4O7) crystals. J. Appl. Phys. 1 November 2011; 110 (9): 093719. https://doi.org/10.1063/1.3658264
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
A step-by-step guide to perform x-ray photoelectron spectroscopy
Grzegorz Greczynski, Lars Hultman
Piezoelectric thin films and their applications in MEMS: A review
Jinpeng Liu, Hua Tan, et al.
Tutorial: Simulating modern magnetic material systems in mumax3
Jonas J. Joos, Pedram Bassirian, et al.
Related Content
Electron traps in Ag-doped Li2B4O7 crystals: The role of Ag interstitial ions
J. Appl. Phys. (May 2022)
Identification of electron and hole traps in lithium tetraborate ( Li 2 B 4 O 7 ) crystals: Oxygen vacancies and lithium vacancies
J. Appl. Phys. (June 2010)
Thermoluminescence studies on γ-irradiated Mn:Li2B4O7 single crystals
Appl. Phys. Lett. (August 2012)
Comparison of optical properties of pure and doped lithium tetraborate single crystals and glasses
AIP Conference Proceedings (June 2012)
Nonlinear Optical Studies of the Sol‐gel Derived Lithium Tetraborate Thin Film
AIP Conference Proceedings (October 2011)