Mössbauer characterization of Nd0.7Sr0.3(Mn1−x57Fex)O3 (x=0.02–0.15)

Abstract The magnetic structure of colossal magneto-resistive Nd 0.7 Sr 0.3 (Mn 1− x 57 Fe x )O 3 ( x =0.02, 0.05, 0.10, and 0.15) has been studied by Mossbauer spectroscopy in magnetic fields up to 60 kG. 57 Fe ions appear to spread over two different magnetic phases. One of them remains ferromagnetic for all values of x , but the other one changes from canted to anti-ferromagnetic with increasing x . For x =0.02 and 0.05, the latter magnetic phase is comprised of small clusters, which are very sensitive temperature and strongly influenced by the applied fields.