Journalartikel

Jahr der Veröffentlichung: 2003

Seiten: 7073-7084

Zeitschrift: Journal of Physics: Condensed Matter

Bandnummer: 15

Heftnummer: 41

ISSN: 0953-8984

DOI Link: https://doi.org/10.1088/0953-8984/15/41/015

Verlag: IOP Publishing

Abstract: 
Using electron paramagnetic resonance (EPR) and in one case also electron nuclear double resonance new trapped electron and hole centres are characterised in ZnWO4 single crystals. In undoped and Al-doped ZnWO4 a new W5+-type defect is produced by UV- or x-irradiation at 77 K. The centre is stabilised by a nearby Al3+, impurity that is substituting for Zn2+. In ZnWO4:Al in addition to the above electron-type defect three kinds of hole-type centres created by x-irradiation at 77 K are also studied: one of these is assigned to an O- ion near a V-Zn-Al-Zn(3+) complex, and the second to an O- ion near a V-Zn-OH- pair. The (g) over tilde- and hydrogen super hyperfine (SHF) tensors of the latter centre have been published previously. Due to the higher concentration in the Al-doped crystal, SHF tensors of two W neighbours could also be determined. The third hole-type defect shows quartet SHF (I = 3/2) with a 100% abundant nucleus and therefore the O- in this centre is most likely stabilised by an Na+ impurity. Complete sets of EPR parameters are compared for trapped electron and trapped hole centres including previously characterised defects.

Harvard-Zitierstil: Watterich, A., Hofstaetter, A., Scharmann, A. and Szakács, O. (2003) Al- and OH-related paramagnetic impurity centres in UV- or x-irradiated ZnWO₄ single crystals, Journal of Physics: Condensed Matter, 15(41), Article PII S0953-8984(03)65276-8. pp. 7073-7084. https://doi.org/10.1088/0953-8984/15/41/015

APA-Zitierstil: Watterich, A., Hofstaetter, A., Scharmann, A., & Szakács, O. (2003). Al- and OH-related paramagnetic impurity centres in UV- or x-irradiated ZnWO₄ single crystals. Journal of Physics: Condensed Matter. 15(41), Article PII S0953-8984(03)65276-8, 7073-7084. https://doi.org/10.1088/0953-8984/15/41/015