Growth and optical properties of chromium borate thin films

Jha, Menaka ; Kshirsagar, Sachin D. ; Ghanashyam Krishna, M. ; Ganguli, Ashok K. (2011) Growth and optical properties of chromium borate thin films Solid State Sciences, 13 (6). pp. 1334-1338. ISSN 1293-2558

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The present study focuses on the process of fabrication of chromium borate films using e-beam evaporation technique. The growth and optical properties of CrBO3 thin films in the thickness range of 2-5 μm deposited by e-beam evaporation on to borosilicate glass substrates is reported for the first time. All films were deposited at ambient temperature using CrB2 as the source material. Electron diffraction studies revealed the low-temperature growth of nanocrystalline CrBO3 films. Raman and FT-IR spectra of the films exhibit signatures of three co-ordinated boron clearly signifying the formation of the borate. The spectral transmission of CrBO3 films shows that films of the order of 2 micron are highly transparent (≈80%) in the visible region. The refractive index at 750 nm varies from 1.6 to 1.7 and the band gap is of the order of 2.4-2.8 eV. Nanoindentation measurements performed on the films indicate that the films are soft with hardness of the order of 0.5-1 GPa.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Chromium Orthoborate; Thin Films; Crystal Structure; Optical Constants; Raman Spectra; Hardness
ID Code:62022
Deposited On:16 Sep 2011 04:02
Last Modified:16 Sep 2011 04:02

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