Abstract
In order to synthesize the superconducting phase La{sub 1.85}Sr{sub 0.15}CuO{sub 4} powders of La{sub 2}O{sub 3}, CuO, and SrCO{sub 3} are usually ground together and annealed at high temperature. We studied another original way: the possibility of using accelerated ions in order to mix the atomic species of thin multilayered films of La(OH){sub 3}, Sr(OH){sub 2}, and Cu and to synthesize crystalline La{sub 1.85}Sr{sub 0.15}CuO{sub 4}. In the first part of this work, we present a review of ion beam mixing in relation to particle-matter interactions. The second part is devoted to a description of our implementation of ion beam analysis techniques and to the determination of experimental uncertainties. The use of X ray diffraction in order to study the films structures is also presented. In the third part, we show that irradiation does not generally lead to very large mixing ratios in our films but induces partial or total desorption of O and H. This is presumably related to the thermodynamic properties of the various coexisting ceramic phases. We do however find evidence of cristalline La{sub 2}CuO{sub 4} formation under irradiation for a specific multilayer configuration. The critical parameters of this method are shown to be the initial configuration
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Citation Formats
Mathevet, J P.
Study of La{sub 1.85}Sr{sub 0.15}CuO{sub 4} superconducting phase synthesis by ion beam mixtures; Etude de la synthese de la phase supraconductrices La{sub 1,85}Sr{sub 0,15}CuO{sub 4} par melange ionique.
France: N. p.,
1990.
Web.
Mathevet, J P.
Study of La{sub 1.85}Sr{sub 0.15}CuO{sub 4} superconducting phase synthesis by ion beam mixtures; Etude de la synthese de la phase supraconductrices La{sub 1,85}Sr{sub 0,15}CuO{sub 4} par melange ionique.
France.
Mathevet, J P.
1990.
"Study of La{sub 1.85}Sr{sub 0.15}CuO{sub 4} superconducting phase synthesis by ion beam mixtures; Etude de la synthese de la phase supraconductrices La{sub 1,85}Sr{sub 0,15}CuO{sub 4} par melange ionique."
France.
@misc{etde_10125863,
title = {Study of La{sub 1.85}Sr{sub 0.15}CuO{sub 4} superconducting phase synthesis by ion beam mixtures; Etude de la synthese de la phase supraconductrices La{sub 1,85}Sr{sub 0,15}CuO{sub 4} par melange ionique}
author = {Mathevet, J P}
abstractNote = {In order to synthesize the superconducting phase La{sub 1.85}Sr{sub 0.15}CuO{sub 4} powders of La{sub 2}O{sub 3}, CuO, and SrCO{sub 3} are usually ground together and annealed at high temperature. We studied another original way: the possibility of using accelerated ions in order to mix the atomic species of thin multilayered films of La(OH){sub 3}, Sr(OH){sub 2}, and Cu and to synthesize crystalline La{sub 1.85}Sr{sub 0.15}CuO{sub 4}. In the first part of this work, we present a review of ion beam mixing in relation to particle-matter interactions. The second part is devoted to a description of our implementation of ion beam analysis techniques and to the determination of experimental uncertainties. The use of X ray diffraction in order to study the films structures is also presented. In the third part, we show that irradiation does not generally lead to very large mixing ratios in our films but induces partial or total desorption of O and H. This is presumably related to the thermodynamic properties of the various coexisting ceramic phases. We do however find evidence of cristalline La{sub 2}CuO{sub 4} formation under irradiation for a specific multilayer configuration. The critical parameters of this method are shown to be the initial configuration of the multilayer and the irradiation temperature. 64 refs..}
place = {France}
year = {1990}
month = {Nov}
}
title = {Study of La{sub 1.85}Sr{sub 0.15}CuO{sub 4} superconducting phase synthesis by ion beam mixtures; Etude de la synthese de la phase supraconductrices La{sub 1,85}Sr{sub 0,15}CuO{sub 4} par melange ionique}
author = {Mathevet, J P}
abstractNote = {In order to synthesize the superconducting phase La{sub 1.85}Sr{sub 0.15}CuO{sub 4} powders of La{sub 2}O{sub 3}, CuO, and SrCO{sub 3} are usually ground together and annealed at high temperature. We studied another original way: the possibility of using accelerated ions in order to mix the atomic species of thin multilayered films of La(OH){sub 3}, Sr(OH){sub 2}, and Cu and to synthesize crystalline La{sub 1.85}Sr{sub 0.15}CuO{sub 4}. In the first part of this work, we present a review of ion beam mixing in relation to particle-matter interactions. The second part is devoted to a description of our implementation of ion beam analysis techniques and to the determination of experimental uncertainties. The use of X ray diffraction in order to study the films structures is also presented. In the third part, we show that irradiation does not generally lead to very large mixing ratios in our films but induces partial or total desorption of O and H. This is presumably related to the thermodynamic properties of the various coexisting ceramic phases. We do however find evidence of cristalline La{sub 2}CuO{sub 4} formation under irradiation for a specific multilayer configuration. The critical parameters of this method are shown to be the initial configuration of the multilayer and the irradiation temperature. 64 refs..}
place = {France}
year = {1990}
month = {Nov}
}