Inductive-Type properties of ( Co 45 Fe 45 Zr 10 ) x ( Al 2 O 3 ) 100x Nanocomposites Produced by the Ion-Beam Sputtering in the Argon and Oxygen Ambient

The paper discusses changes in the phase-shift angle and capacity Cp depending on the frequency of alternating current of (Co45Fe45Zr10)x(Al2O3)(100-x) nanocomposites characterized by the metallic phase content of x = 38,2 at.%. The tested samples have been produced in the argon and oxygen atmosphere by means of ion-beam sputtering of two targets made of the CoFeZr alloy and strips of the Al2O3 dielectric. Samples have been tested before and after their annealing at the temperature T and frequency f. Dependences of the phase-shift angle (T, f) and capacity Cp(T, f) have been determined for temperatures of the 77-373 K range and frequency values ranging from 50 to 106 Hz. For the tested samples of the x = 38,2 at.% content it has been found that at high annealing temperatures the phase-shift angle is < 0 within the low-frequency area, while at high frequency values > 0. The analysis has shown that in the samples studied the series connection of capacity and noncoil-like inductance can be realized. Capacitive properties of LC circuit with – 90 L < 0° are presented at low frequencies and its inductive properties with 0° H < 90° become apparent at high frequencies.