Paramagnetic Centres in Be-Doped MgO Single Crystals

Using a variation of arc-fusion technique, Be-doped MgO single crystals were grown, in which about 0.01% of the cation sites are occupied by Be 2☎ . This gives rise to a variety of Be-containing paramagnetic centres, easily detectable by EPR. The models of the centres are proposed and the values of...

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Bibliographic Details
Published in:Radiation effects and defects in solids 2003-01, Vol.158 (1-6), p.163-166
Main Authors: Kärner, T., Dolgov, S. A., Isakhanyan, V., Maaroos, A., Nakonechnyi, S.
Format: Article
Language:English
Subjects:
Color centers and other defects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Defects
Electron paramagnetic resonance and relaxation
EPR
Exact sciences and technology
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Physics
Simple oxides
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Summary:Using a variation of arc-fusion technique, Be-doped MgO single crystals were grown, in which about 0.01% of the cation sites are occupied by Be 2☎ . This gives rise to a variety of Be-containing paramagnetic centres, easily detectable by EPR. The models of the centres are proposed and the values of their spin-Hamiltonian parameters are determined and discussed. Two of them-V OH-Be and H-Be centres-stem from well-known paramagnetic centres such as V OH , and interstitial H atom. In addition, because of the non-central position of the ion, an isolated Be 2☎ can trap a hole forming a Be 2☎ O − centre. The symmetry of the Be 2☎ O − centre at T
ISSN:1042-0150
1029-4953
DOI:10.1080/1042015021000052638