title: Complex permittivity measurements of ferroelectrics employing composite dielectric resonator technique.
abstract: Composite cylindrical TE(0n1) mode dielectric resonator has been used for the complex permittivity measurements of ferroelectrics at frequency about 8.8 GHz. Rigorous equations have been derived that allowed us to find a relationship between measured resonance frequency and Q-factor and the complex permittivity. It has been shown that the choice of appropriate diameter of a sample together with rigorous complex angular frequency analysis allows precise measurements of various ferroelectric. Proposed technique can be used for materials having both real and imaginary part of permittivity as large as a few thousand. Variable temperature measurements were performed on a PbMg(1/3)Nb(2/3)O3 (PMN) ceramic sample, and the measured complex permittivity have shown good agreement with the results of measurements obtained on the same sample at lower frequencies (0.1-1.8 GHz).
authors.affiliation: Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland. krupka@imio.pw.edu.pl
authors.forename: Jerzy
authors.initials: J
authors.lastname: Krupka
authors.forename: Tomasz
authors.initials: T
authors.lastname: Zychowicz
authors.forename: Viktor
authors.initials: V
authors.lastname: Bovtun
authors.forename: Sergiy
authors.initials: S
authors.lastname: Veljko