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Ablation replacement of iron with Co, Mn, Ni, and Cu during growth of iron-based superconductor films in the Fe0.9M0.1Se0.92 system
Shubnikov Institute of Crystallography, RAS, Moskva.
Moscow State University.
Moscow State University.
Shubnikov Institute of Crystallography, RAS, Moskva.
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2014 (English)In: Crystallography reports (Print), ISSN 1063-7745, E-ISSN 1562-689X, Vol. 59, no 5, 739-743 p.Article in journal (Refereed) Published
Abstract [en]

Thin films of ironbased chalcogenide superconductors FeSe0.92, with iron partially replaced (atleast up to 10 at %) by elements such as cobalt, nickel, manganese, or copper, have been grown on the surfaceof (10 2) LaAlO3 crystals. Growth is performed by the laser ablation of a target prepared in the form of aceramic pellet by hightemperature synthesis and the sintering of preliminarily pressed stoichiometric mixture of powders. Iron in these ceramics is replaced with an alloying metal by no more than 3 at %. The rest(7 at %) of the metal is in the form of precipitates of other phases. Xray diffraction analysis of the grown filmshas shown that they are singlecrystal and free of any precipitates of other crystallographic orientations andphases. This is evidence of the complete (10 at %) replacement of iron with a doping metal in the film structure. This circumstance indicates that the synthesis of components occurs more actively and completely during laser ablation (than in solidphase chemical reactions) as a result of the transformation of multicomponent target material into plasma. Thus, one can fabricate film materials in a wider range of chemical compositions than in the form of solidphase synthesized ceramics.

Place, publisher, year, edition, pages
2014. Vol. 59, no 5, 739-743 p.
Keyword [en]
Crystallography
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:hj:diva-25854DOI: 10.1134/S1063774514050174ISI: 000342214000015OAI: oai:DiVA.org:hj-25854DiVA: diva2:786355
Available from: 2015-02-05 Created: 2015-02-05 Last updated: 2015-06-15Bibliographically approved

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