| Autor: |
BELOUS, A., OVCHAR, O., KRAMARENKO, O., MISCHUK, D., JANCAR, B., SPREITZER, M., SUVOROV, D., ANNINO, G., GREBENNIKOV, D., MASCHER, P. |
| Předmět: |
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| Zdroj: |
Ferroelectrics; 2009, Vol. 387 Issue 1, p36-45, 10p, 4 Black and White Photographs, 4 Graphs |
| Abstrakt: |
A slight deviation from the compositional stoichiometry in both A-site and B-site deficient perovskites Ba(M1/32 + Nb2/3)O3 (M - Co, Zn, Mg) was found to promote cation ordering processes in studied materials. The highest magnitudes of the Qxf product have been obtained in the non-stoichiometric BCN (Qxf = 90 000 GHz), and BMN (Qxf = 150 000-200 000 GHz). A significant “extrinsic” contribution to the microwave dielectric loss has been found in Co and Mg -containing perovskites. Possible structural factors responsible for the variation of the Q-factor in studied systems have been discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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