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MBE growth of LaNiBiO1-x thin films

Buckow, A. and Retzlaff, R. and Kurian, J. and Alff, L. (2012):
MBE growth of LaNiBiO1-x thin films.
In: Physics Procedia, Elsevier Science Publishing, pp. 300-303, 27, ISSN 18753892,
[Online-Edition: http://dx.doi.org/10.1016/j.phpro.2012.03.470],
[Article]

Abstract

The discovery of superconductivity in FeAs based compounds has generated tremendous interest in the search for new superconducting materials. The toxic nature of As naturally calls for the search for alternative materials with similar structure which may be superconducting. LaNiBiO1-x has the same structure as FeAs-1111. We have grown LaNiBiO1-x thin films on (100) MgO substrate by reactive molecular beam epitaxy (RMBE). Films were grown by simultaneous evaporation of La, Ni and Bi from elemental sources by electron beam evaporators and the in situ oxidation is achieved by an RF activated oxygen radical source. The reflection high energy electron diffraction and X-ray diffraction analysis revealed that the films were polycrystalline in nature. The LaNiBiO1-x phase forms only in a very narrow growth parameter window and is very sensitive to the oxidation conditions. The polycrystalline films have a Tc (onset) of ∼ 5.5 K.

Item Type: Article
Erschienen: 2012
Creators: Buckow, A. and Retzlaff, R. and Kurian, J. and Alff, L.
Title: MBE growth of LaNiBiO1-x thin films
Language: English
Abstract:

The discovery of superconductivity in FeAs based compounds has generated tremendous interest in the search for new superconducting materials. The toxic nature of As naturally calls for the search for alternative materials with similar structure which may be superconducting. LaNiBiO1-x has the same structure as FeAs-1111. We have grown LaNiBiO1-x thin films on (100) MgO substrate by reactive molecular beam epitaxy (RMBE). Films were grown by simultaneous evaporation of La, Ni and Bi from elemental sources by electron beam evaporators and the in situ oxidation is achieved by an RF activated oxygen radical source. The reflection high energy electron diffraction and X-ray diffraction analysis revealed that the films were polycrystalline in nature. The LaNiBiO1-x phase forms only in a very narrow growth parameter window and is very sensitive to the oxidation conditions. The polycrystalline films have a Tc (onset) of ∼ 5.5 K.

Journal or Publication Title: Physics Procedia
Volume: 27
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: pnictide superconductors, molecular beam epitaxy, thin films
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 07 Jan 2014 09:35
Official URL: http://dx.doi.org/10.1016/j.phpro.2012.03.470
Identification Number: doi:10.1016/j.phpro.2012.03.470
Funders: This work is supported by DFG (Deutsche Forschungsgemeinschaft), Priority Program on Pnictdide Superconductors SPP 1458.
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