Abstract
Undoped and Co-doped α-MnO2 nanowires were prepared by hydrothermal method at 140°C. XRD revealed the tetragonal structure of α-MnO2 and Co doping did not affect the structure of α-MnO2. The morphology is found to be one dimensional nanowire, which is confirmed by SEM. The optical properties were studied by PL and FTIR. The PL emission spectra showed strong UV emission peak at 392nm along with some weak emissions. The characteristic vibrational modes were analyzed by FTIR. The dielectric properties of undoped and doped samples were studied in the frequency range of 50Hz to 1MHz at different temperatures. Enhanced relative permittivity was observed for Co-doped MnO2 nanowire. The magnetic properties were analyzed by VSM, where ferromagnetic behavior along with antiferromagnetic component at room temperature was observed.
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