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The perovskite compounds of LaMn1-xCoxO3(0.2⩽x⩽0.5) have been studied by means of NMR spectroscopy in powder samples prepared by the solid state reaction and sol–gel methods. The NMR signals were observed in the frequency range 250–650MHz at 4.2K in zero external magnetic field. A relatively narrow spectral line assigned to 55 Mn in Mn4+ is situated around 270–320MHz in all spectra. Additional...
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