ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
High concentration of two types of P donors up to 1017 cm-3 in SiC enriched with 30Siafter neutron transmutation doping (NTD) has been achieved. It was established that annealing atsufficiently low temperature of 1300oC, that is 500-600°C lower compared with annealing of NTDSiC with natural isotope composition, gives rise to the EPR signal of shallow P donors, labeled sPc1,sPc2 and sPh. The correlated changes of the EPR spectra of the three sP centres in all theexperiments and the qualitative similarities with spectra of shallow N donors prove that thesecentres have shallow donor levels and a similar electronic structure and belong to different latticesites. The annealing at 1700°C results in a transformation of one type of P donors (sPc1, sPc2 andsPh) into another type having low temperature EPR spectra labeled dP
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.556-557.599.pdf
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