Single-crystal growth of the ternary BaFe${}_2$As${}_2$ phase using the vertical Bridgman technique

Abstract

Ternary Ba-Fe-As system has been studied to determine a primary solidification field of the BaFe${}_2$As${}_2$ phase. We found that the BaFe${}_2$As${}_2$ phase most likely melts congruently and primarily solidifies either in the FeAs excess or Ba${}_x$As${}_{100-x}$ excess liquid. Knowing the primary solidification field, we have performed the vertical Bridgman growth using the starting liquid composition of Ba${}_{15}$Fe${}_{42.5}$As${}_{42.5}$. Large single crystals of the typical size 10x4x2 mm${}^3$ were obtained and their quality was confirmed by X-ray Laue and neutron diffraction.

Submitted to Jpn. J. Appl. Phys.; revised

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• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs
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