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EPR study on amorphous germanium oxygen, deposition angle, annealing, and substrate temperature effects
Author(s) -
Kubler L.,
Gewinner G.,
Koulmann J. J.,
Jaéglé A.
Publication year - 1976
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220780113
Subject(s) - electron paramagnetic resonance , annealing (glass) , amorphous solid , materials science , oxygen , germanium , saturation (graph theory) , analytical chemistry (journal) , chemistry , silicon , nuclear magnetic resonance , crystallography , composite material , metallurgy , mathematics , organic chemistry , combinatorics , chromatography , physics
The influence of various deposition parameters, especially oxygen pressure and deposition angle, on the a‐Ge EPR spectra is studied. In most the cases the results corroborate those already obtained by other authors with other methods (such as conductivity). Two different mechanisms are discussed to explain the spin density decrease: saturation of defects by introducing oxygen and decrease of the defect concentration by structural rearrangements with annealing or substrate temperature increase. At suitable annealing conditions a spin density increase suggests the formation of defects such as multivacancies. The comparison of the EPR line thus obtained with the initial one shows that the defects formed during the evaporation of the purest samples are the same. The EPR line is inhomogeneous.