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26 April 2024 |
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Article overview
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Iron pnictides: Single crystal growth and effect of doping on structural, transport and magnetic properties | | G. L. Sun
; D. L. Sun
; M. Konuma
; P. Popovich
; A. Boris
; J. B. Peng
; K.-Y. Choi
; P. Lemmens
; C. T. Lin
; | | Date: |
18 Jan 2009 | | Abstract: | We demonstrate the preparation of large, free standing iron pnictide single
crystals with a size up to 20 x 10 x 1 mm3 using solvents in zirconia crucibles
under argon atmosphere. Transport and magnetic properties are investigated to
study the effect of potassium doping on the structural and superconducting
property of the compounds. The spin density wave (SDW) anomaly at Ts ~140 K in
BaFe2As2 single crystals from self-flux shifts to Ts ~85 K due to Sn solvent
growth. We show direct evidence for an incorporation of Sn on the Fe site. The
electrical resistivity and magnetic susceptibility data show a sharp
superconducting transition temperature Tc~32 K for both doped single crystals
of Ba0.72K0.28Fe2As2 and Sr0.85K0.15Fe2As2, respectively. There is direct
evidence for a coexistence of the SDW and superconductivity in the low doping
regime of Sr1-xKxFe2As2 single crystals. Structural implications of the doping
effects as well as the coexistence of the two order parameters are discussed. | | Source: | arXiv, 0901.2728 | | Services: | Forum | Review | PDF | Favorites | |
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