[01] A. A. Babaev, Amirkhanov Institute of Physics, Daghestan Scientific Center, Russian Academy of Science, Makhachkala, Russia. [02] R. K. Arslanov, Amirkhanov Institute of Physics, Daghestan Scientific Center, Russian Academy of Science, Makhachkala, Russia. [03] P. P. Khokhlachev, Amirkhanov Institute of Physics, Daghestan Scientific Center, Russian Academy of Science, Makhachkala, Russia. [04] T. R. Arslanov, Amirkhanov Institute of Physics, Daghestan Scientific Center, Russian Academy of Science, Makhachkala, Russia. [05] A. K. Filippov, “PLASMAS” Limited Company, Saint-Petersburg, Russia. [06] E. I. Terukov, Ioffe Physical-Technical Institute, Russian Academy of Science, Saint-Petersburg, Russia.

We present a study on the electrical behavior of polymer composites based on multi-walled carbon nanotubes (MWCNT) under the application of temperature and hydrostatic pressure. An unstable behavior of the composite film structure upon cyclic heating has been observed. It has been found that the resistivity has maxima at T ≈ 340 and ≈420 K, which are responsible for intrinsic defects. The current–voltage characteristics have been studied in the stationary and pulsed modes at different temperatures. Our observations also show that pressure-induced a structural change of the MWCNT to an ellipsoid shape at P~1.5 GPa, a measurement that correlates rather well with theoretical predictions. By direct and reverse high-pressure measurements of resistance, as well as current-voltage characteristics, we have identified reversibility of electrophysical properties.

Multi-Walled Carbon Nanotubes, High Pressure, Currient-Voltage Characteristics

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