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

Kazumasa Iida; Jens Haenisch; Michael Schulze; Saicharan Aswartham; Sabine Wurmehl; Bernd Buechner; Ludwig Schultz; Bernhard Holzapfel

doi:10.1063/1.3660257

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

Superconductivity 2011-12-12 v1 Materials Science

Authors: Kazumasa Iida , Jens Haenisch , Michael Schulze , Saicharan Aswartham , Sabine Wurmehl , Bernd Buechner , Ludwig Schultz , Bernhard Holzapfel

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Abstract

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.

Keywords

epitaxial thin films thin films iron-based superconductor

Cite

@article{arxiv.1111.3923,
  title  = {Generic Fe buffer layers for Fe-based superconductors: Epitaxial FeSe1-xTex thin films},
  author = {Kazumasa Iida and Jens Haenisch and Michael Schulze and Saicharan Aswartham and Sabine Wurmehl and Bernd Buechner and Ludwig Schultz and Bernhard Holzapfel},
  journal= {arXiv preprint arXiv:1111.3923},
  year   = {2011}
}

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

Abstract

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