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Generic Fe buffer layers for Fe-based superconductors: Epitaxial FeSe1-xTex thin films

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arxiv 1111.3923 v1 pith:2SUXC4G2 submitted 2011-11-16 cond-mat.supr-con cond-mat.mtrl-sci

Kazumasa Iida , Jens Haenisch , Michael Schulze , Saicharan Aswartham , Sabine Wurmehl , Bernd Buechner , Ludwig Schultz , Bernhard Holzapfel This is my paper · ORCID
classification cond-mat.supr-concond-mat.mtrl-sci
keywords fese1-xtexfilmsbafe2as2bilayersdirectionexhibitout-of-planesimilar
verification ladder T0 review T1 audit T2 compute T3 formal
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Biaxially textured FeSe1-xTex films have been realized on Fe-buffered MgO substrates by pulsed laser deposition. Similar to the Fe/BaFe2As2 bilayers, the crystalline quality of FeSe1-xTex films exhibit a sharp out-of-plane and in-plane texture less than 0.9{\deg}. The Fe/FeSe1-xTex bilayers showed high superconducting transition temperatures of over 17 K. The angular-dependent critical current densities exhibit peaks positioned at H // ab similar to other pnictide thin films. The volume pinning force of FeSe1-xTex in this direction is very strong compared with that of Co-doped BaFe2As2, due to a good matching between the interlayer distance in the c direction and the out-of-plane coherence length.

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