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The Carbon Vacancy Pair in 4H and 6H SiC
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials.
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.ORCID iD: 0000-0002-6405-9509
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2000 (English)In: Materials Science Forum, Vol. 338 - 342, Trans Tech Publications , 2000, 821-824 p.Conference paper, Published paper (Refereed)
Abstract [en]

Electron paramagnetic resonance (EPR) was used to study defects in p-type 4H and 6H SiC irradiated with 2.5 MeV electrons at elevated temperatures (400 °C). After irradiation, an anisotropic EPR spectrum, labeled EI4, having monoclinic symmetry (C1h) and an effective spin S = 1 was observed in both 4H and 6H SiC. The same g-tensor with the principal values, gx = 2.0051, gy = 2.0038 and gz = 2.0029 was determined for the spectra in both polytypes. Here the z- and x-axis lie in the (1 1 2̄ 0) plane and the y-axis perpendicular to this plane. The angle between the principal z-axis and the c-axis is 54°. The fine structure parameters were determined as D = 3.28×10-2 cm-1 and 3.44×10-2 cm-1 for 6H and 4H SiC, respectively; E = 0.67×10-2 cm-1 for both polytypes. From the obtained 29Si hyperfine structure and spin Hamiltionian parameters, the defect can be identified as the pair of two carbon vacancies in the (1 1 2̄ 0) or equivalent planes.

Place, publisher, year, edition, pages
Trans Tech Publications , 2000. 821-824 p.
Series
Materials Science Forum, ISSN 1662-9752 ; 338-342
National Category
Natural Sciences Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-45132DOI: 10.4028/www.scientific.net/MSF.338-342.821Local ID: 79780OAI: oai:DiVA.org:liu-45132DiVA: diva2:265994
Conference
ICSCRM'99: 8th International Conference on Silicon Carbide and Related Materials, Research Triangle Park, North Carolina, USA, 10-15 October 1999
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2015-03-25

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Nguyen, Son TienChen, WeiminMonemar, BoJanzén, Erik

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