Effect of spacer layer thickness on optical properties of [SnO₂/Mn]ₙ and [SnO₂/Co]ₙ discontinuous multilayers
2012
Saipriya, S. | Singh, R.
Multilayers (ML) of [SnO₂/Mn]ₙ and [SnO₂/Co]ₙ were fabricated by rf sputtering. The effect of spacer layer (SnO₂) thickness, x on the optical properties of these ML was studied. The transmittance initially decreases as x increases from 12 to 24Å and then decreases as x increases to 36Å. Similar trend is followed by band gap. For [SnO₂/Mn] ML, it decreases from 4.47 to 3.16eV then increases to 4.28eV and for [SnO₂/Co] ML, it decreases from 4.06 to 3.75eV then increases to 4.27eV as x changes from 12 to 36Å. This variation is attributed to the quantum interference effects in the SnO₂ layers. The ML with x=24Å is found to have low defect concentration compared to the ML with x=12 and 36Å. The optical properties of the ML are more sensitive to the SnO₂ layer thickness than that of Mn or Co. The variation of optical properties of the present ML is an artifact of the solubility limit of Mn or Co in the interface layers.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library