High-pressure growth of fluorine-free SmFeAsO${}_{1-x}$ superconducting single crystals

Abstract

Superconducting single crystals of SmFeAsO${}_{1-x}$ without fluorine doping were grown at a pressure of 3.3 GPa and a temperature of 1350-1450 ${}^{\circ }$C by using the self-flux method. Plate-like single crystals of a few-150 $\mu$m in their lateral size were obtained. Single crystals showed the superconducting transition at about 53.5 K with a narrow transition width of 0.5 K. The synchrotron-irradiated x-ray diffractometry patterns and high-angle-annular-dark-field scanning transmission electron microscopy images point to the high quality of the crystals with a well-defined layered tetragonal structure. The chemical compositions of the crystals were estimated by using the electron-probe x-ray microanalysis.

arXiv comment12 pages, 3 figures

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Cited by in corpus (8)

• Two-gap and paramagnetic pair-breaking effects on upper critical field of SmFeAsO${}_{0.85}$ and SmFeAsO${}_{0.8}$F${}_{0.2}$ single crystals
• Flux growth at ambient pressure of millimeter-sized single crystals of LaFeAsO, LaFeAsO1-xFx, and LaFe1-xCoxAsO
• High-pressure flux growth, structural, and superconducting properties of LnFeAsO (Ln = Pr, Nd, Sm) single crystals
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Optical spectroscopy study on single crystalline LaFeAsO
• Formation of partial energy gap below the structural phase transition and the rare-earth element substitution effect on infrared phonons in ReFeAsO (Re=La, Nd, and Sm)
• Growth of whisker-like and bulk single crystals of PrFeAs(O,F) under high pressure
• Electronic Behavior of Superconducting SmFeAsO0.75