Single crystal growth and superconductivity of Ca(Fe1-xCox)2As2
Rongwei Hu, Sheng Ran, S. L. Bud'ko, W. E. Straszheim, P. C. Canfield
TL;DR
This paper reports the growth of single crystals of Ca(Fe1-xCox)2As2 and maps its phase diagram, revealing unique features compared to similar compounds due to doping and structural effects.
Contribution
It provides the first detailed phase diagram of Ca(Fe1-xCox)2As2 and explores how Co doping influences its magnetic and structural properties.
Findings
Phase diagram mapped out for 0 <= x <= 0.082
Distinct phase behavior compared to Sr and Ba analogs
Charge doping and structural effects influence phase stability
Abstract
We report the single crystal growth of Ca(Fe1-xCox)2As2 (0 <= x <= 0.082) from Sn flux. The temperature-composition phase diagram is mapped out based on the magnetic susceptibility and electrical transport measurements. Phase diagram of Ca(Fe1-xCox)2As2 is qualitatively different from those of Sr and Ba, it could be due to both the charge doping and structural tuning effects associated with Co substitution.
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