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Electronic and Magnetic Properties of Superconducting Sr4V2Fe2As2O6 Versus Sr4Sc2Fe2As2O6

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Abstract

First principles of FLAPW-GGA calculations have been performed with the purpose to understand the peculiarities of band structure and Fermi surface topology for recently discovered 37 K superconductor: Sr4V2Fe2As2O6—in comparison with isostructural phase Sr4Sc2Fe2As2O6. Our main finding is that the replacement of Sc with V leads to drastic transformation of electronic, magnetic and conductive properties of these materials: as against non-magnetic Sr4Sc2Fe2As2O6 which is formed from non-magnetic conducting [Fe2As2] and insulating [Sr4Sc2O6] blocks, Sr4V2Fe2As2O6 consists of non-magnetic conducting [Fe2As2] blocks and [Sr4V2O6] blocks which exhibit magnetic half-metallic properties.

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Authors and Affiliations

  1. Institute of Solid State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya St., 91, Ekaterinburg, 620990, Russia

    I. R. Shein & A. L. Ivanovskii

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  1. I. R. Shein
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  2. A. L. Ivanovskii
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Correspondence to I. R. Shein.

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Shein, I.R., Ivanovskii, A.L. Electronic and Magnetic Properties of Superconducting Sr4V2Fe2As2O6 Versus Sr4Sc2Fe2As2O6 . J Supercond Nov Magn 22, 613–617 (2009). https://doi.org/10.1007/s10948-009-0489-2

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  • DOI: https://doi.org/10.1007/s10948-009-0489-2

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