Microwave dielectric properties of lanthanum based complex perovskites

Nath, Masood A. ; Samal, Saroj L. ; Obulesu, K. Rama ; Raju, K. C. James ; Ganguli, Ashok K. (2014) Microwave dielectric properties of lanthanum based complex perovskites Journal of Alloys and Compounds, 615 . pp. 18-24. ISSN 0925-8388

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jallcom.2014.06.122


The present investigation discusses the synthesis and dielectric properties of three series of oxides of the formula La2BaTi2M1−xCuxO9 (where M = Mg, Zn and Cd). The reactions have been carried out via solid state method and all the compositions crystallize in the disordered cubic perovskite structure. Suitable substitution at both A and B sites lead to enhancement in the dielectric properties at high frequencies. The relative permittivity and loss tangent have been measured at X-band (8.2–12.4 GHz) and Ku-band (12.4–18 GHz) frequencies. The oxides show a dielectric constant of 20–30 while the dielectric loss is quite low in the order of 10−3–10−4 (at 500 kHz) and 10−2 at X and Ku-band. There is scope for further investigations in these systems to realize useful materials for microwave applications.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Perovskites; Electronic Materials; Dielectric Properties; Density
ID Code:111723
Deposited On:28 Sep 2017 12:24
Last Modified:28 Sep 2017 12:24

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