Tripathi, Saurabh ; Pandey, Dhananjai ; Mishra, Sanjay Kumar ; Krishna, P. S. R. (2008) Morphotropic phase-boundary-like characteristic in a lead-free and non-ferroelectric (1-x)NaNbO3-xCaTiO3 system Physical Review B, 77 (5). 052104_1-052104_4. ISSN 1098-0121
Full text not available from this repository.
Official URL: http://link.aps.org/doi/10.1103/PhysRevB.77.052104
Related URL: http://dx.doi.org/10.1103/PhysRevB.77.052104
Abstract
We report here an anomalous peak in the composition dependence of the dielectric permittivity of non-ferroelectric (1-x)NaNbO3-xCaTiO3 ceramics for the composition range 0.10<x<0.20. This is reminiscent of a similar phenomenon in the ferroelectric morphotropic phase boundary ceramics. Rietveld analysis of the powder x-ray diffraction data for various compositions reveals that this peak is linked with a change of crystal structure from one orthorhombic phase in the Pbma space group for 0 x 0.10 to another orthorhombic phase in the Pbnm space group for x 0.20 through an intermediate long period modulated orthorhombic phase whose lattice parameter is ~14 times the lattice parameter of the Pbnm phase of CaTiO3 in the [010] direction (q~[0,1/14,0]).
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to American Physical Society. |
ID Code: | 27229 |
Deposited On: | 10 Dec 2010 12:55 |
Last Modified: | 05 Mar 2011 09:24 |
Repository Staff Only: item control page