Presence of Inductivity in (CoFeZr)x(PZT)1-x Nanocomposite Produced by Ion Beam Sputtering

T.N. Kołtunowicz a, P. Żukowski a, O. Boiko a, A.K. Fedotov b and A. Larkin b aLublin University of Technology, Nadbystrzycka 38a, 20-618 Lublin, Poland bBelarusian State University, 4, Independence av., 220030 Minsk, Belarus

Full Text PDF

This paper presents the investigations of the electrical properties of the (CoFeZr)x(PZT)1-x nanocomposite with the metallic phase content x=43.8 at.%, which was produced by ion beam sputtering. Such preparation took place under an argon atmosphere with low oxygen content with its partial pressure PO2 = 2×10-3 Pa. The measurements were performed using alternating current within the frequency range of 50 Hz-105 Hz for measuring temperatures ranging from 238 K to 328 K. The (CoFeZr)43.8(PZT)56.2 nanocomposite sample subjected to a 15 min annealing process in air at the temperature Ta=423 K demonstrates a phase angle of -90° ≤ θ ≤ 0° in the frequency range 50 Hz-105 Hz. It corresponds to the capacitive type of conduction. In the frequency range 104-105 Hz sharp minima in selected conductivity vs. frequency characteristics occur, which corresponds to a current resonance phenomenon in RLC circuits. In case of a sample annealed at Ta=498 K the inductive type of conduction with 0° ≤ θ ≤ +90° occurs in a high frequency area. At the frequency fr characterized by the phase angle θ = 0°, the capacity value reaches its local minimum. It indicates a voltage resonance phenomenon in conventional RLC circuits. The θ = +90° crossing in the frequency dependence of phase angle corresponds to the current resonance phenomenon, which is represented by a strong local minimum in the conductivity vs. frequency characteristics.

DOI: 10.12693/APhysPolA.128.853 PACS numbers: 62.23.Pq, 79.20.Rf, 81.40.Ef, 72.80.Le