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

This paper presents the investigations of the electrical properties of the (CoFeZr)x(PZT)1-x nanocomposite with the metallic phase content x = 43.8at.%, which was produced by ion beam sputtering.Such preparation took place under an argon atmosphere with low oxygen content with its partial pressure PO 2 = 2 × 10 -3 Pa.The measurements were performed using alternating current within the frequency range of 50 Hz-10 5 Hz for measuring temperatures ranging from 238 K to 328 K.The (CoFeZr)43.8(PZT)56.2nanocomposite 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-10 5 Hz.It corresponds to the capacitive type of conduction.In the frequency range 10 4 -10 5 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.