Poster: Structure/Properties Relationships in doped MgB2 single crystals
Authors: G. Schuck, M. Wörle, N.D. Zhigadlo, K. Rogacki, J. KarpinskiConference: XX Congress of the International Union of Crystallography, August 23-31, 2005, Florence, Italy , PDF
MgB2 is a two electronic-bands, two energy gaps superconductor with a high Tc of 39K and unusual properties such as temperature and field dependent anisotropy.
Superconducting hexagonal single crystals of pure and Al, C, Mn and Fe doped MgB2 phase have been grown at a pressure of 30 kbar using cubic anvil technique [1-2] to study the intrinsic properties of MgB2. The superconducting transition of doped MgB2
single crystals can be tuned in a wide temperature range between 10 and
39 K by adjustment of the nominal composition. Al [1], Mn and Fe are
substituted on the Mg position of MgB2 and C [2] on the B position. Introduction of disorder by substitution is partly observed.
In order to elucidate structure/properties relationships we have carried
out x-ray single crystal measurements on doped MgB2 single crystals
(the composition varies between 1 and 15 % doping material). Additional
temperature dependent measurements on pure MgB2 and Mn doped MgB2 has been carried out.
- J. Karpinski, N. D. Zhigadlo, G. Schuck, S. M. Kazakov, B. Batlogg, K. Rogacki, R. Puzniak, J. Jun, E. Muller, P. Wagli, R. Gonnelli, D. Daghero, G. A. Ummarino, V. A. Stepanov, Phys. Rev. B, Phys. Rev. B, 71 (2005) 174506.
- S. M. Kazakov, R. Puzniak, K. Rogacki, A. V. Mironov, N. D. Zhigadlo, J. Jun, Ch. Soltmann, B. Batlogg, J. Karpinski, Phys. Rev. B 71, 024533 (2005).
Keywords: high-Tc superconductivity, structure-physical properties relationships, X-ray crystal structure analysis