Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
79 (2001), S. 2061-2063
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Significant dielectric enhancement is observed in 0.3BiFeO3–0.7SrBi2Nb2O9, when a single-phase layered perovskite structure was formed by sintering the mechanically activated oxide composition. The Curie point of xBiFeO3–(1−x)SrBi2Nb2O9 was shifted upward with an increase in the BiFeO3 content. 0.3BiFeO3–0.7SrBi2Nb2O9 exhibits a dielectric constant of 1.84×105 at the Curie point of 750 °C. The lattice dimensions of xBiFeO3–(1−x)SrBi2Nb2O9 decrease slightly with an increase in the content of BiFeO3 over the composition range of x=0–0.2, while 0.3 mol BiFeO3 in SrBi2Nb2O9 led to recovery in the lattice dimensions. The much enhanced dielectric properties observed in 0.3BiFeO3–0.7SrBi2Nb2O9 are therefore due to the enlarged rattling space for both Nb5+ and in particular for smaller Fe3+. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1405420
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