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Role of silver doping in oxygen incorporation of oxide thin film

Kumar, D and Oktyabrsky, S and Kalyanaraman, R and Narayan, J and Apte, PR and Pinto, R and Manoharan, SS and Hegde, MS and Ogale, SB and Adhi, KP (1997) Role of silver doping in oxygen incorporation of oxide thin film. In: Materials Science and Engineering B, 45 (1-3). pp. 55-58.

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Official URL: http://dx.doi.org/10.1016/S0921-5107(96)01920-4

Abstract

A distinctive characteristic of silver in oxygen incorporation of oxide thin films during pulsed laser ablation has been discovered. Optical emission spectroscopy studies of laser-induced plume of Ag-target indicates the presence of AgO species whose concentration increases with an increase in oxygen partial pressure. The formation of AgO in laser-plume has been found to be very useful for the realization of high temperature superconducting YBa2Cu3O7-delta (YBCO) and giant magnetoresistive La0.7MnO3-delta (LMO) thin films with dramatically superior quality if the target materials contained a small amount of silver. The improvement in the quality of these films is brought about by the supply of atomic oxygen to oxide lattices during their formation. This becomes possible due to the fact that Ag, after it is ablated with other constituent materials in the target, gets moderately oxidized in an oxygen atmosphere and the oxidized species dissociate back into Ag and nascent O at the substrate surface. The nascent oxygen is very highly reactive and is easily assimilated into the lattice of these compounds. (C) 1997 Elsevier Science S.A.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Silver doping;Oxide thin films;Oxygen incorporation;Pulsed laser ablation
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 30 Jun 2011 12:22
Last Modified: 30 Jun 2011 12:22
URI: http://eprints.iisc.ernet.in/id/eprint/38446

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