このエントリーをはてなブックマークに追加
ID 33884
file
creator
Ravindra Singh Solanki
Akhilesh Kumar Singh
S. K. Mishra
Shane J. Kennedy
Dhananjai Pandey
NDC
Physics
abstract
The antiferrodistortive (AFD) phase transition for a pseudotetragonal composition of Pb(Zr0.530Ti0.470)O3 doped with 6% Sr has been investigated using sound velocity (4–320 K), high-resolution synchrotron x-ray powder diffraction (100–800 K), and high-resolution as well as high-flux neutron powder diffraction measurements (4 K) to settle the existing controversies about the true ground state of Pb(ZrxTi1-x)O3 (PZT) in the morphotropic phase boundary (MPB) region. The multiplet character of the neutron diffraction profiles of (3/2 1/2 1/2)pc (pseudocubic or pc indices) and (3/2 3/2 1/2)pc superlattice peaks, appearing below the AFD transition temperature, rules out the rhombohedral R3c space group. The true ground state is confirmed to be monoclinic in the Cc space group, in agreement with the predictions of the first-principles calculations and earlier findings for pure PZT in the MPB region. Here, 6% Sr2+ substitution and the use of high-wavelength (λ = 2.44 Å) neutrons have played a key role in settling the existing controversies about the true ground state of PZT in the MPB region.
journal title
Physical Review B
volume
Volume 84
issue
Issue 14
start page
144116-1
end page
144116-11
date of issued
2011
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
(c) 2011 American Physical Society
relation url
department
Graduate School of Advanced Sciences of Matter



Last 12 months's access : ? times
Last 12 months's DL: ? times


This month's access: ? times
This month's DL: ? times