Abstract
Transport and dielectric properties of polycrystalline CoO films were studied as functions of the applied field, frequency and temperature. TheI–V plots showed that the Poole-Frenkel field emission mechanism is responsible for conduction at fields>105 V/cm. The ac conductivity σ(ω), the imaginary part of the dielectric constantε 2, and tan δ plots as functions of frequency revealed three dispersion regions. The σ(ω) andε 2 frequency dependence indicates a non-adiabatic hopping of charge carriers at low frequencies and adiabatic hopping at high frequencies. The activation energy of a dielectric oscillator is 0.15 eV.
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Work supported by the Office of Naval Research.
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Lalevic, B., Fuschillo, N., Kuliyev, B. et al. Transport and dielectric properties of thin polycrystalline CoO films. Appl. Phys. 5, 127–132 (1974). https://doi.org/10.1007/BF00928224
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DOI: https://doi.org/10.1007/BF00928224