Short note on magnetic impurities in SmFeAsO${}_{1-x}$F${}_x$ (x=0, 0.07) compounds revealed by zero-field ${}^{75}$As NMR

A. A. Sidorenko, R. De Renzi, A. Martinelli +1

We have performed zero-field ${}^{75}$As nuclear magnetic resonance study of SmFeAsO${}_{1-x}$F${}_x$ (x=0, 0.07) polycrystals in a wide frequency range at various temperatures. ${}^{75}$A…