Impedance model of metal-dielectric nanocomposites produced by ion-beam sputtering in vacuum conditions and its experimental verification for thin films of (FeCoZr)x(PZT)(100-x)

被引：50

作者：

Zukowski, P. ^{[1
]}

Koltunowicz, T. N. ^{[1
]}

Boiko, O. ^{[1
]}

Bondariev, V. ^{[1
]}

Czarnacka, K. ^{[1
]}

Fedotova, J. A. ^{[2
]}

Fedotov, A. K. ^{[3
]}

Svito, I. A. ^{[3
]}

机构：

[1] Lublin Univ Technol, PL-20618 Lublin, Poland

[2] BSU, Natl Ctr Particles & High Energy Phys, Minsk 220040, BELARUS

[3] Belarusian State Univ, Minsk 220030, BELARUS

来源：

VACUUM | 2015年 / 120卷

关键词：

AC measurement; Electron transport; Nanocomposites metal-dielectric; HOPPING CONDUCTANCE; REAL PART; CONDUCTIVITY; NANOPARTICLES; EQUALIZATION; AR;

D O I：

10.1016/j.vacuum.2015.04.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The paper presents results of testing electric properties (resistance, capacity and phase angle in an equivalent parallel circuit) of ferromagnetic alloy-dielectric nanocomposites (FeCoZr)(x)(PZT)((100-x)) produced by ion-beam sputtering in vacuum conditions. The measurements have been performed using alternating current within the frequency range of 50 Hz-1 MHz for measuring temperatures ranging from 77 K to 373 K. In nanocomposites (CoFeZr)(x)(PZT)((100-x)), produced by ion beam sputtering using a beam of combined argon and oxygen ions, for x approaching the percolation threshold, frequency dependences of the phase angle phi that resemble those occurring in RLC parallel circuits have been observed. In the low frequency area, the phase angle of 90 degrees <= phi < 0 degrees occurs. It corresponds to the capacitive type of conduction. In the high frequency area, the inductive type of conduction with 0 degrees <= phi <= 90 degrees occurs. At the resonance frequency f(0), characterized by the phase angle of phi = 0 degrees, the capacity value reaches its strong local minimum. A theoretical basis for a model of the AC hopping conduction for metal-dielectric nanocomposites has been developed and on that basis frequency dependences of the phase angle, resistance and capacitive current density components have been analyzed. The obtained theoretical and experimental results have been compared. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：37 / 43

页数：7

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