Coexistence of cluster spin glass and superconductivity in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ for $0.060\le x\le 0.071$

A. P. Dioguardi, J. Crocker, A. C. Shockley +9

We present 75As nuclear magnetic resonance data from measurements of a series of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ crystals with $0.00\le x\le 0.075$ that reveals the coexistence…