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The magnetic structure of colossal magneto-resistive Nd 0.7 Sr 0.3 (Mn 1-x57 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 60kG. 57 Fe ions appear to spread over two different magnetic phases. One of them remains ferromagnetic for all values of...
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