Nonlinear relaxational polarization in aluminum oxide

Frequency and electric field dependent measurements of the complex capacitance on Al 2 O 3 based metal-insulator-metal capacitors were conducted. A nonlinear relaxational polarization in Al 2 O 3 was investigated systematically by means of varying the thickness of the dielectric and characterizing s...

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Bibliographic Details
Published inIEEE transactions on dielectrics and electrical insulation Vol. 22; no. 2; pp. 1220 - 1231
Main Authors Kankate, L., Gratsov, A., Kliem, H.
Format Journal Article
LanguageEnglish
Published IEEE 01.04.2015
Subjects
Aluminum oxide
asymmetric double well potential
Capacitance
Dielectrics
Electric fields
Electrodes
Frequency measurement
Kohlrausch relaxations
Relaxational polarization
Temperature measurement
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Summary:Frequency and electric field dependent measurements of the complex capacitance on Al 2 O 3 based metal-insulator-metal capacitors were conducted. A nonlinear relaxational polarization in Al 2 O 3 was investigated systematically by means of varying the thickness of the dielectric and characterizing samples at various temperatures. Employing the asymmetric double well potential model, where the charges fluctuate between two potential minima, we show that the relaxational polarization in metal oxide can be interpreted.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2015.7076825