Sections
Personal tools
 

Pnictide based superconducting thin films

The discovery of superconductivity in the iron-pnictides in 2008 by Kamihara et al., (J. Am. Chem. Soc. 130 (2008) 3297) immediately stimulated the intensive research on this material class. The iron pnictide compounds REFeAsO1-xFx became a hot topic, since rare-earth (RE) substitution increases the superconductive transition temperature beyond 50 K challenging the dominant role of the cuprates. The successful growth of epitaxial superconducting LaFeAsO1-xFx thin films by pulsed laser deposition (PLD) offers a broad access to a fundamental experimental investigation of the new compounds. So far, the mechanisms for superconductivity, properties of the vortex-phase or possible applications are heavily discussed. Therefore, a reliable, qualitative and fast method of sample fabrication like PLD is able to provide the necessary material of research.

   


ironpnictides.png

Figure: a) LaFeAsO1-xFx target for PLD; b) PLD plume during preparation of 122 thin films c) superconductive transition of a LaFeAsO1-xFx thin film d) transition temperatures for Co-doped BaFe2As2 films on various substrates

 

 

Most recent articles:

Co-doped Ba-122 microbridges:  Phys. Rev. B 83, 134514 (2011)

  • D. Rall, K. Il'in, S. Haindl, F. Kurth, T. Thersleff, L. Schultz, B. Holzapfel, M. Siegel, "Critical current densities in ultrathin Ba(Fe,Co)2As2 microbridges"

optical study on multiband nature of Co-doped Ba-122 thin films:  Phys. Rev. B 83, 140502 (2011)

  • E. G. Maksimov, A. E. Karakozov, B. P. Gorshunov, A. S. Prokhorov, A. A. Voronkov, E. S. Zhukova, V. S. Nozdrin, S. S. Zhukov, D. Wu, M. Dressel, S. Haindl, K. Iida, B. Holzapfel, "Two-band Bardeen-Cooper-Schrieffer superconducting state of the iron pnictide compound Ba(Fe0.9Co0.1)2As2"

mass anisotropy of LaFeAsO1-xFx:   Phys. Rev. Lett. 106, 137001 (2011)

  • M. Kidszun, S. Haindl, T. Thersleff, J. Hänisch, A. Kauffmann, K. Iida, J. Freudenberger, L. Schultz, B. Holzapfel, "Critical Current Scaling and Anisotropy in Oxypnictide Superconductors" 

point-contact spectroscopy on 1111 thin films:  Supercond. Sci. Technol. 24, 065010 (2011)

  • Yu. G. Naidyuk, O. E. Kvitnitskaya, I. K. Yanson, G. Fuchs, S. Haindl, M. Kidszun, L. Schultz, B. Holzapfel, "Point-contact study of the ReFeAsO1-xFx (Re = La, Sm) superconducting films",

Co-doped Ba-122 thin films on technical substrates:  Appl. Phys. Express 4, 013103 (2011)

  • K. Iida, J. Hänisch, S. Trommler, V. Matias, S. Haindl, F. Kurth, I. Lucas del Pozo, R. Hühne, M. Kidszun, J. Engelmann, L. Schultz, B. Holzapfel, "Epitaxial Growth of Superconducting Ba(Fe1-xCox)2As2 Thin Films on Technical Ion Beam Assisted Deposition MgO Substrates"

 

New on arXiv:

ASC 2010 contribution:  arXiv:1012.1523  (accepted for publication in IEEE Trans. Appl. Supercond.)

  • J. Hänisch, K. Iida, S. Haindl, F. Kurth, A. Kauffmann, M. Kidszun, T. Thersleff, J. Freudenberger, L. Schultz, B. Holzapfel, "Jc Scaling and Anisotropies in Co-doped Ba-122 thin films"

 

See our Publications:

Pulsed Laser Deposition of La-1111 thin films:  Supercond. Sci. Technol. 21, 122001 (2008)

  • E. Backen, S. Haindl, T. Niemeier, R. Hühne, T. Freudenberg, J. Werner, G. Behr, L. Schultz, B. Holzapfel: "Growth and anisotropy of La(O, F)FeAs thin films deposited by pulsed laser deposition"

Influence of strain on TC of Co-doped 122 thin films:  Appl. Phys. Lett. 95, 192501 (2009)

  • K. Iida, J. Hänisch, R. Hühne, F. Kurth, M. Kidszun, S. Haindl, J. Werner, L. Schultz, B. Holzapfel, "Strong TC dependence for strained epitaxial Ba(Fe1-xCox)2As2 thin films"

Epitaxial thin film growth of La-1111 by Pulsed Laser Deposition:  Supercond. Sci. Technol. 23, 022002 (2010)

  • M. Kidszun, S. Haindl, E. Reich, J. Hänisch, K. Iida, L. Schultz, B. Holzapfel, "Epitaxial LaFeAsO1–xFx thin films grown by pulsed laser deposition"

High upper critical fields and weak link behaviour in La-1111 thin films:  Phys. Rev. Lett. 104, 077001 (2010)

  • S. Haindl, M. Kidszun, A. Kauffmann, K. Nenkov, N. Kozlova, J. Freudenberger, T. Thersleff, J. Hänisch, J. Werner, E. Reich, L. Schultz, B. Holzapfel: "High upper critical fields and evidence of weak link behavior in LaFeAsO1-xFx thin films"

Optical conductivity of Co-doped 122 thin films:  Phys. Rev. B 81, 060509R (2010)  

  • B. Gorshunov, D. Wu, A. A. Voronkov, P. Kallina, K. Iida, S. Haindl, F. Kurth, L. Schultz, B. Holzapfel, M. Dressel, "Direct observation of the superconducting energy gap in the optical conductivity of the iron pnictide superconductor Ba(Fe0.9Co0.1)2As2"

Blatter scaling of critical current densities in Co-doped 122 thin films:  Phys. Rev. B 81, 100507R (2010)

  • K. Iida, J. Haenisch, T. Thersleff, F. Kurth, M. Kidszun, S. Haindl, R. Hühne, L. Schultz, B. Holzapfel, "Scaling behavior of the critical current in clean epitaxial Ba(Fe1-xCox)2As2 thin films"  

Fe/122 bilayers:  Appl. Phys. Lett. 97, 022506 (2010) 

  • T. Thersleff, K. Iida, S. Haindl, M. Kidszun, D. Pohl, A. Hartmann,  F. Kurth, J. Hänisch, R. Hühne, B. Rellinghaus, L. Schultz, B. Holzapfel, "Coherent interfacial bonding on the FeAs tetrahedron in Fe/Ba(Fe1-xCox)2As2 bilayers" 

First results on Gd-1111 thin films:  EPL 90, 57005 (2010) 

  • M. Kidszun, S. Haindl, T. Thersleff, J. Werner, M. Langer, J. Hänisch, K. Iida, E. Reich, L. Schultz, B. Holzapfel, "Fabrication of superconducting oxypnictide thin films"

Pnictide thin film Josephson junctions:  Advances in Science and Technology 75, 136 (2010)

  • P. Seidel, F. Schmidl, V. Grosse, S. Döring, S. Schmidt, M. Kidszun, S. Haindl, I. Mönch, L. Schultz, B. Holzapfel, "Iron pnictide thin film hybrid Josephson junctions" presented at CIMTEC 2010

Co doped Ba-122 hybrid Josephson junctions:  Appl. Phys. Lett. 97, 172504 (2010)

  • S. Schmidt, S. Döring, F. Schmidl, V. Grosse, P. Seidel, K. Iida, F. Kurth, S. Haindl, I. Mönch, B. Holzapfel, "BaFe1.8Co0.2As2 thin film hybrid Josephson junctions"

Co doped Ba-122 thin films on piezoelectric substrates:  New Journal of Physics 12, 103030 (2010)

  • S. Trommler, R. Hühne, K. Iida, P. Pahlke, S. Haindl, L. Schultz, B. Holzapfel, "Reversible shift in the superconducting transition for La1.85Sr0.15O4 and BaFe1.8Co0.2As2 using piezoelectric substrates"

Fe/Ba-122 bilayer:  Appl. Phys. Lett. 97, 172507 (2010)

  • K. Iida, S. Haindl, T. Thersleff, J. Hänisch, F. Kurth, M. Kidszun, R. Hühne, I. Mönch, L. Schultz, B. Holzapfel, R. Heller, "Influence of Fe buffer thickness on the crystalline quality and the transport properties of Fe/Ba(Fe1-xCox)2As2 bilayers"

evidence for a nodal gap in Co-doped Ba-122 thin films:  Phys. Rev. B 82, 224507 (2010)

  • T. Fischer, A. V. Pronin, J. Wosnitza, K. Iida, F. Kurth, S. Haindl, L. Schultz, B. Holzapfel, E. Schachinger, "Optical evidence for a nodal superconducting gap in Ba(Fe0.9Co0.1)2As2"

 

Research Funding: DFG - Deutsche Forschungsgemeinschaft (German Research Foundation)

 
Related Topics