Title :
Nonlinear relaxational polarization in aluminum oxide
Author :
Kankate, L. ; Gratsov, A. ; Kliem, H.
Author_Institution :
Inst. of Electr. Eng. Phys., Saarland Univ., Saarbrucken, Germany
Abstract :
Frequency and electric field dependent measurements of the complex capacitance on Al2O3 based metal-insulator-metal capacitors were conducted. A nonlinear relaxational polarization in Al2O3 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.
Keywords :
MIM devices; aluminium compounds; capacitance; capacitors; dielectric polarisation; dielectric relaxation; Al2O3; aluminum oxide; asymmetric double well potential model; capacitance; charge fluctuation; dielectric samples; electric field dependent measurements; frequency dependent measurements; metal oxide; metal-insulator-metal capacitors; nonlinear relaxational polarization; Aluminum oxide; Capacitance; Dielectrics; Electric fields; Electrodes; Frequency measurement; Temperature measurement; Kohlrausch relaxations; Relaxational polarization; asymmetric double well potential; capacitance;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2015.7076825
