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Lessons from oxypnictide thin films
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2013 (English)In: International Journal of Modern Physics B, ISSN 0217-9792, Vol. 27, no 4, 1330001- p.Article, review/survey (Refereed) Published
Abstract [en]

First experiments on the growth of oxypnictide F-doped LaFeAsO thin films indicated an incomplete normal-to-superconducting transition and offered a work programme challenging to overcome possible difficulties in their fabrication. In this regard the possibility of an all in-situ epitaxial growth appeared to be a matter of time and growth parameters. The following review clarifies that F-doped oxypnictide thin films are extremely difficult to grow by in-situ PLD due to the formation of very stable impurity phases such as oxyfluorides (LaOF) and oxides (La2O3) and the loss of stoichiometry possibly due to incongruent evaporation of the target or re-evaporation of volatile elements at the substrate surface. However, the review also demonstrates that the employed two-step fabrication process for oxypnictide thin films has been successfully applied in the preparation of clean polycrystalline as well as of epitaxial thin films. Fundamental investigations on the upper critical field, its temperature dependence and its anisotropy contributed to an understanding of multiband superconductivity in oxypnictides.

Place, publisher, year, edition, pages
2013. Vol. 27, no 4, 1330001- p.
Keyword [en]
Fe-based superconductors, Oxypnictides, Thin films
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Materials Science
Identifiers
URN: urn:nbn:se:uu:diva-195393DOI: 10.1142/S0217979213300016ISI: 000316894100007OAI: oai:DiVA.org:uu-195393DiVA: diva2:607659
Available from: 2013-02-25 Created: 2013-02-25 Last updated: 2017-12-06Bibliographically approved

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Thersleff, Thomas

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