المؤلفون: Veeraswamy, Y., Reddy, K. Ganga, Bhasker, S. Uday, Reddy, M. V. Ramana

المصدر: AIP Conference Proceedings ; ISSN 0094-243X

الإتاحة: https://doi.org/10.1063/1.5050740Test

المؤلفون: Y. Veeraswamy, M. V. Ramana Reddy, S. Uday Bhasker, K. Ganga Reddy

المصدر: AIP Conference Proceedings.

مصطلحات موضوعية: Materials science, Scanning electron microscope, Band gap, Torr, Analytical chemistry, Vacuum chamber, Crystallite, Substrate (electronics), Thin film, Electron beam physical vapor deposition

الوصف: High pure Gold powder was taken as starting material to prepare robust target for electron beam evaporation. The films were deposited on ultrasonically cleaned (100) oriented Silica substrate maintained at a substrate temperature of 573K. The vacuum chamber was evacuated by a Diffusion pump to a base vacuum better than 10−6 Torr, allowed inert gas in to chamber to maintain inert atmosphere under 5x10−5 Torr vacuum. The crystallinity of the films was investigated using GIXRD. The films were found to be polycrystalline in nature and crystallizes in a cubic structure with preferred (1 1 1) orientation. The surface morphology and compositional analysis was carried out for these films using Scanning Electron Microscope (SEM) and Energy Dispersive X-Ray Spectroscopy (EDS) respectively. Thickness of the films was estimated by using stylus profilometer. Optical Absorption and reflectance measurements were carried out on Au thin films using UV-VIS spectrophotometer in the wavelength range 300nm-1000nm. The optical constants like band gap and other parameters were calculated from the optical absorption data. These films were found to be promising materials for Surface Plasmon Resonance Applications (SPR).

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::42a876a47040beec972308b083e3889eTest
https://doi.org/10.1063/1.5050740Test

المؤلفون: Prasad, K. Ganga, Niranjan, Manish K., Asthana, Saket

المصدر: AIP Conference Proceedings ; ISSN 0094-243X

الإتاحة: https://doi.org/10.1063/1.4946153Test

المؤلفون: Saket Asthana, Manish K. Niranjan, K. Ganga Prasad

المصدر: AIP Conference Proceedings.

مصطلحات موضوعية: Generalized gradient, Condensed matter physics, Chemistry, Lattice (order), Density of states, Density functional theory, Electronic structure, Frame work, Electronic band structure, Electronic properties

الوصف: We report the electronic structure of the AgMO3(M=Nb, Ta) within the frame work of density functional theory and calculations are performed within the generalized gradient approximation (GGA) by using ultrasoft pseudopotentials. The calculated equilibrium lattice parameters and volumes are extracted from fitting of Birch third order equation of state and which are reasonable agreement with the available experimental results. The density of states,band structure of Ag(Nb,Ta)O3 reveals that the valance bands mostly occupied with O-2p and O-2s states and whereas conduction band occupied with Nb (Ta) 4d(5d) states including less contribution from Ag 5s states.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::a25d046657740656ab3bfbccf628e339Test
https://doi.org/10.1063/1.4946153Test