期刊
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
卷 28, 期 5, 页码 1157-1160出版社
A V S AMER INST PHYSICS
DOI: 10.1116/1.3474913
关键词
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Four pi* resonance peaks were observed in the B-K near edge x-ray absorption fine structure spectra of boron nitride thin films prepared by magnetron sputtering. In the past, these peaks have been explained as the K-absorption of boron atoms, which are present in environment containing nitrogen vacancies, the number of which is 1-3 corresponding to the three peaks at higher photon energy. However, the authors found that there was a strong correlation between the intensities of these three peaks and that of O-K absorption after wide range scanning and simultaneous measurement of nitrogen and oxygen K-absorptions of the BN films. Therefore, the authors conclude that these three peaks at the higher energy side correspond to boron atoms bound to one-to-three oxygen atoms instead of three nitrogen atoms surrounding the boron atom in the h-BN structure. The result of the first-principles calculation with a simple cluster model supported the validity of this explanation. (C) 2010 American Vacuum Society. [DOI: 10.1116/1.3474913]
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