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ID 33884
本文ファイル
著者
Ravindra Singh Solanki
Akhilesh Kumar Singh
S. K. Mishra
Shane J. Kennedy
Dhananjai Pandey
NDC
物理学
抄録(英)
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.
掲載誌名
Physical Review B
84巻
14号
開始ページ
144116-1
終了ページ
144116-11
出版年月日
2011
出版者
American Physical Society
ISSN
1098-0121
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
(c) 2011 American Physical Society
関連情報URL
部局名
先端物質科学研究科