Phase separation at the magnetic-superconducting transition in La${}_{0.7}$Y${}_{0.3}$FeAsO${}_{1-x}$F${}_x$

G. Prando, S. Sanna, G. Lamura +7

In this paper we report a detailed ${\mu }^{+}$SR and {}${}^{19}$F-NMR study of the La${}_{0.7}$Y${}_{0.3}$FeAsO${}_{1-x}$F${}_x$ class of materials. Here, the diamagnetic La${}_{1-y}$Y${}_y$ sub…