Abstract
Na doped ZnO films were fabricated via a hydrothermal process. The films have shown room temperature ferromagnetism and p-type conductivity. Crossover of positive to negative magnetoresistance has been observed with the variation of Na doping concentrations. The positive MR is due to p-p exchange interaction induced Zeeman splitting to suppress the hopping path of holes. The ferromagnetism is attributed to the formation of a Zn vacancy complex. The negative magnetoresistance is due to the minimization of spin-dependent scattering by the applied magnetic field.
Original language | English |
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Pages (from-to) | 1285 - 1291 |
Number of pages | 7 |
Journal | Chemistry of Materials |
Volume | 27 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2015 |