The effect of Li-substitution on the M-phases of AgNbO3

	The effect of Li-substitution on the M-phases of AgNbO3
	Khan, H. U.1; Sterianou, I.1; Miao, S.1,2; Pokorny, J.1,3; Reaney, I. M.1
刊名	journal of applied physics
	2012-01-15
卷号	111 期号:2
英文摘要	ceramics in the solid solution, lixag1-xnbo3 (lan) with 0 <= x <= 0.20, have been synthesized by the mixed oxide method. x-ray diffraction (xrd) revealed that only compositions with x <= 0.05 were single phase which were indexed according to pbcm symmetry with a unit cell, root 2a(p) x root 2a(p) x 4a(p) (where a(p) is the fundamental perovskite lattice parameter). for compositions with x >= 0.1, second phase peaks attributed to linbo3 were observed and the matrix phase transformed to a metrically rhombohedral structure according to xrd. a phase transition at 0.05 < x <= 0.1 was confirmed by raman spectroscopy and electron diffraction but the latter technique revealed superstructure reflections for x >= 0.1 at +/- 1/6{00l} and 1/2{ooo} +/- 1/6{00l} (where o = odd). these support the premise that li doping invokes a new complex modulated tilt system with a root 2a(p) x root 2a(p) x 6a(p) unit cell rather than root 2a(p) x root 2a(p) x 4a(p) (pbcm). reflections of the type +/- 1/6{00l} are, however, streaked along the inverted right perpendicular001inverted left perpendicular direction indicating that the structure may be incommensurate or only partially ordered. the appearance of the root 2a(p) x root 2a(p) x 6a(p) structure is associated with strong asymmetry in the peak in permittivity attributed to the m-3-m-2 and a decrease in intensity of the peak in permittivity associated with the m-2-m-1 transition. slim polarization versus field curves characteristic of weak ferroelectricity were observed for compositions with x <= 0.05 but for higher values of x the loops were unsaturated albeit with larger remanent polarization. (c) 2012 american institute of physics. [doi: 10.1063/1.3677871]
WOS标题词	science & technology ; physical sciences
类目[WOS]	physics, applied
研究领域[WOS]	physics
关键词[WOS]	agnb1-xtaxo3 solid-solutions ; niobate single-crystals ; dielectric-properties ; silver niobate ; piezoelectric properties ; ferroelectric phase ; raman-scattering ; lithium-niobate ; transitions ; ceramics
收录类别	SCI
语种	英语
WOS记录号	WOS:000299792400065
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/142956]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 3.Acad Sci Czech Republic, Inst Phys, Prague 18221 8, Czech Republic
推荐引用方式 GB/T 7714	Khan, H. U.,Sterianou, I.,Miao, S.,et al. The effect of Li-substitution on the M-phases of AgNbO3[J]. journal of applied physics,2012,111(2).
APA	Khan, H. U.,Sterianou, I.,Miao, S.,Pokorny, J.,&Reaney, I. M..(2012).The effect of Li-substitution on the M-phases of AgNbO3.journal of applied physics,111(2).
MLA	Khan, H. U.,et al."The effect of Li-substitution on the M-phases of AgNbO3".journal of applied physics 111.2(2012).