Correlation of microwave dielectric properties and normal vibration modes of xBa(Mg1/3Ta2/3)O3-(1-x)Ba(Mg1/3Nb2/3)O3 ceramics : II. Infrared spectroscopy

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Title:	Correlation of microwave dielectric properties and normal vibration modes of xBa(Mg1/3Ta2/3)O3-(1-x)Ba(Mg1/3Nb2/3)O3 ceramics : II. Infrared spectroscopy
Authors:	Chen, Yi-Chun;Cheng, Hsiu-Fung;Liu, Hsiang-Lin;Chia, Chih-Ta;林諭男;Lin, I-Nan
Contributors:	淡江大學物理學系
Date:	2003-08-19
Issue Date:	2009-12-31 10:20:57 (UTC+8)
Publisher:	American Institute of Physics (AIP)
Abstract:	The relationship between the microwave dielectric properties and the IR active phonons of xBa(Mg1/3Ta2/3)O3 –(12x)Ba(Mg1/3Nb2/3)O3 ceramics was investigated. The IR modes were assigned, and the origin of dielectric response was determined. Among the 15 prominent IR modes, we found that the normal vibrations of the O layers and that of the Ta/Nb layers are strongly correlated to the measured dispersion parameters, such as the resonant strength ~4pr! and the damping coefficient ~g!. The frequency shifts of the normal modes of the O layers and that of the Ta/Nb layers explain the linear decrease of microwave dielectric constant ~K! as x increases, while the width of these modes correlate with the Q3 f value.
Relation:	Journal of Applied Physics 94(5), pp.3365-3370
DOI:	10.1063/1.1597969
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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