Structure and dielectric characterization of the La(Mg1/2Ti1/2)O-3-Nd(Mg1/2Ti1/2)O-3 system
authors Seabra, MP; Salak, AN; Avdeev, M; Ferreira, VM
nationality International
journal JOURNAL OF PHYSICS-CONDENSED MATTER
keywords COMPLEX PEROVSKITE CERAMICS; MICROWAVE APPLICATIONS; INFRARED REFLECTIVITY; CRYSTAL-STRUCTURE; HZ
abstract (1-x)La(Mg1/2Ti1/2)O-3-xNd(Mg1/2Ti1/2)O-3 [0 less than or equal to x less than or equal to 1] ceramics were prepared from powders obtained by a non-conventional chemical route based on the Pechini method. La(Mg1/2Ti1/2)O-3 and Nd(Mg1/2Ti1/2)O-3 were found to form perovskite solid solutions in the whole compositional range. The structure of all the compositions was refined using the P2(1)/n space group, which allows account of B-site ordering. The relative permittivity and temperature coefficient of the resonant frequency measured in the gigahertz range were analysed with respect to composition of the system. The non-monotonic dependence of the microwave quality factor on x was described qualitatively with the damped classical oscillator model and assuming 'two-mode' behaviour of the A <----> BO6 vibration mode in the solid solutions.
publisher IOP PUBLISHING LTD
issn 0953-8984
year published 2003
volume 15
issue 24
beginning page 4229
ending page 4238
digital object identifier (doi) 10.1088/0953-8984/15/24/316
web of science category Physics, Condensed Matter
subject category Physics
unique article identifier WOS:000184410100025
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