ISSN: 2311-1801
| Malinenko V. P. | Petrozavodsk State University, vmal@psu.karelia.ru |
| Aleshina L. A. | Petrozavodsk State University, aleshina@psu.karelia.ru |
| Pergament A. L. | Petrozavodsk State University, aperg@psu.karelia.ru |
| Germak G. V. | Petrozavodsk State University, ggv4949@gmail.com |
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Key words: Manganese dioxide crystal structure electrical switching metal-insulator transition oxide electronics. |
Summary: MnO2 samples are obtained by pyrolytic decomposition of manganese nitrate, and thin films of manganese oxide are also deposited by vacuum thermal evaporation and by electrochemical anodic oxidation of metal Mn. The measurements of the electrical conductivity temperature dependences reveal the change of conductivity mechanisms depending on temperature in the range of 450–25 K and the metal–insulator phase transition at T ~ 80 K is described. The switching effects with N-shaped (at low temperatures) and S-shaped (at room temperatures and above) I-V characteristics are studied. Switching mechanisms are discussed based on metal-insulator transitions and an electrothermal instability. © Petrozavodsk State University |
Is passed for the press: 13 december 2013 year | |