AbstractComposites of La 0.67 Ca 0.33 MnO 3 (LCMO), a colossal magnetoresistance perovskite and NiFe 2 O 4 (NF), an insulating magnetic oxide have been prepared in situ using microwave-refluxing technique. Microstructural studies of the composites show that the two phases are uniformly distributed and the grain size of both the phases is identical, in the range 10-40 nm. The NF appears as a separate phase for concentrations x > 0.10 M, where M is the molecular weight of NF in the starting precursor solution. …
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