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Please use this identifier to cite or link to this item: http://hdl.handle.net/10203/7872

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Title 

Measurement and calculation of optical band gap of chromium aluminum oxide films

Authors 

Kim, EJiang, ZTNo, K[No, Kwangsoo] icon

Keywords 

chromium aluminum oxideoptical band gap

Issue Date 

Aug-2000

Publisher 

INTS PURE APPLIED PHYSICS

Citation 

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES REVIEW PAPERS, v.39, no.8, pp.4820-4825

Abstract 

The optical band gap is a basic property of optical materials. The measured band gap depends not only on the material but also on its characteristics such as crystallinity and stoichiometry. The optical band gap of chromium aluminum oxide films was measured and calculated by three different methods. Firstly, we used the conventional experimental-graphical method, which is commonly used. However, this method is applicable only to an all-crystalline phase or an all-amorphous phase. The second one was an experimental-calculation method applicable to films composed of both crystalline and amorphous phases. We calculated the optical band gap between the highest occupied molecular orbital of O2p and the lowest unoccupied molecular orbital of Cr3d in Cr1.71Al0.29O3 films composed of both amorphous and crystalline phases. Also, a band gap for the d-d transition was obtained. Finally, the measured value was compared with the theoretical optical band gap calculated by the discrete variational-Xα (DV-Xα) method.

ISSN 

0021-4922

URI 

http://hdl.handle.net/10203/7872

DOI 

http://dx.doi.org/10.1143/JJAP.39.4820

Appears in Collections

MS-Journal Papers(저널논문)


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