2014/08/15 by T. J. Williams, Williams, T. J., A. A. Aczel +12 · 1 citation
Business, Management and Accounting · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Intellectual Capital and Performance Analysis #Iron-based superconductors research #Rare-earth and actinide compounds #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.1408.3643
openalex publication_date 2014/08/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report muon spin relaxation/rotation (uSR) measurements of single crystal Ba(Fe1-xCox)2As2 with x=0.038 and 0.047. Zero field (ZF)-uSR and Transverse field (TF)-iSR measurements of these underdoped samples find the presence of magnetism and superconductivity. We find internal fields along the c-axis whose magnitude decreases with increasing doping. We find evidence for a low-temperature volume fraction that is only weakly magnetic, where that volume fraction increases with increasing Co doping of the sample. TF-uSR measurements show slight changes in the spectra that indicate magnetic inhomogeneities due to the loss of Fe moments in the system, the effect of which is larger in the higher Co doping. We discuss the existence of superconductivity in these samples in close proximity to strong magnetic order.