Electrical conductivity in undoped and Mn2+-doped NaNO2 single crystals
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Electrical conductivity studies in NaNO2 single crystals with inherent impurities and also in crystals with added Mn2+ impurities have been reported. The heating conductivity runs of undoped and doped NaNO2 crystals have been compared. The decrease in conductivity in cooling following a heating run has been attributed to the oxidation during heating leading to the bulk precipitation of impurities in the host. Above 170°C however the intrinsic defects are responsible for conduction. An anomaly is noticed in both the heating and cooling conductivity runs of the sample at about the Curie temperatures and has been found to show thermal hysteresis.
KeywordsElectrical conductivity NaNO2 single crystals intrinsic defects thermal hysteresis
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