NDLI: AC Hopping Conductance in Nanocomposite Films with Ferromagnetic Alloy Nanoparticles in a PbZrTiO$

Content Provider	Springer Nature Link
Author	Koltuwicz, T.N. Zukowski, P. Boiko, O. Saad, A. Fedotova, J.A. Fedotov, A.K. Larkin, A.V. Kasiuk, J.
Copyright Year	2015
Abstract	In this work, the temperature and frequency dependences of the real part of the admittance [σ(f, T)] of annealed nanocomposite films containing Co$_{45}$ Fe$_{45}$Zr$_{10}$-based nanoparticles covered with native oxides and embedded in a doped PbZrTiO$_{3}$ ferroelectric matrix were studied. The nanocomposites studied were deposited by ion sputtering a complex target in a mixed Ar/O$_{2}$ atmosphere followed by a 15-min annealing process (with steps of 25 K) in air in the temperature range of 398 K ≤ T $_{a}$ ≤ 573 K. The σ(f, T) of the annealed samples was measured in the temperature range of 77 K < T $_{p}$ < 373 K at frequencies of 50 Hz < f < 1 MHz. The observed σ(f, T) dependences confirmed that the annealed samples displayed the effects of negative capacitance over the whole frequency and temperature ranges studied because of the pronounced oxidation of the nanoparticles. The σ(f, T) dependences obtained are described using an earlier-developed AC hopping conductance model. Comparisons between experimental and simulation results allow the model parameters to be estimated, such as the activation energies of the hopping conductance and the lifetimes of the electrons in the nanoparticles.
Starting Page	2260
Ending Page	2268
Page Count	9
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	44
Issue Number	7
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2015-03-13
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Admittance electronic transport hopping conductance nanocomposite Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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