Low-temperature synthesis and structural properties of ferroelectric K3WO3F3 elpasolite

被引：9

作者：

Atuchin, V. V. ^{[1
]}

Gavrilova, T. A. ^{[2
]}

Kesler, V. G. ^{[3
]}

Molokeev, M. S. ^{[4
]}

Aleksandrov, K. S. ^{[4
]}

机构：

[1] SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia

[2] SB RAS, Inst Semicond Phys, Lab Nanolithog & Nanodiagnost, Novosibirsk 630090, Russia

[3] SB RAS, Inst Semicond Phys, Lab Phys Principles Integrated Microelect, Novosibirsk 630090, Russia

[4] SB RAS, Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia

来源：

CHEMICAL PHYSICS LETTERS | 2010年 / 493卷 / 1-3期

关键词：

PEROVSKITE-LIKE OXYFLUORIDES; CORE-LEVEL SPECTROSCOPY; PHASE-TRANSITIONS; SOLID-STATE; ELECTRON-DIFFRACTION; DIFFUSE-SCATTERING; RHEED ANALYSIS; POLAR; BEHAVIOR; (NH4)(3)TIOF5;

D O I：

10.1016/j.cplett.2010.05.023

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Low-temperature ferroelectric G2 polymorph of K3WO3F3 has been prepared by chemical synthesis. Structural and chemical properties of the final product have been evaluated with X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Structure parameters of G2-K3WO3F3 are refined by the Rietveld method from XRD data measured at room temperature (space group Cm, Z = 2, a = 8.7350(3) angstrom, b = 8.6808(5) angstrom, c = 6.1581(3) angstrom, beta = 135.124(3) angstrom, V = 329.46(3) angstrom(3); R-B = 2.47%). Partial ordering of oxygen and fluorine atoms has been found over anion positions. Mechanism of ferroelectric phase transition in A(2)BMO(3)F(3) oxyfluorides is discussed. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：83 / 86

页数：4

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