Growth and Characterization of Centimeter-Sized Ba2LaFeNb4O15 Crystals from High-Temperature Solution under a Controlled Atmosphere

被引：15

作者：

Albino, Marjorie ^{[1
]}

Veber, Philippe ^{[1
]}

Castel, Elias ^{[1
]}

Velazquez, Matias ^{[1
]}

Schenk, Kurt ^{[2
]}

Chapuis, Gervais ^{[2
]}

Lahaye, Michel ^{[1
]}

Pechev, Stanislav ^{[1
]}

Maglione, Mario ^{[1
]}

Josse, Michael ^{[1
]}

机构：

[1] Univ Bordeaux, CNRS, ICMCB, 87 Ave Dr A Schweitzer, F-33608 Pessac, France

[2] Ecole Polytech Fed Lausanne, BSP Cubotron, Lab Cristallog, CH-1015 Lausanne, Switzerland

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2013年 / 15期

关键词：

Crystal growth; Solid-state structures; Flux methods; Barium; Niobium; Relaxors; BARIUM-SODIUM NIOBATE; TETRAGONAL TUNGSTEN BRONZES; HEATED PEDESTAL GROWTH; BA2NANB5O15; CRYSTALS; INCOMMENSURATE MODULATION; PHASE-TRANSITION; OXYGEN VACANCIES; SINGLE-CRYSTALS; STATE; CERAMICS;

D O I：

10.1002/ejic.201300008

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Centimeter-sized single crystals of Ba2LaFeNb4O15 were grown from a high-temperature solution by using LiBO2 flux and a sealed platinum assembly. The obtained single crystals display the same physical properties as their ceramic counterparts. A frequency-dependent dielectric permittivity maximum was found (Tm = 100 K at 5 kHz), which indicates relaxor behavior. Magnetic susceptibility measurements revealed purely paramagnetic behavior between 10 and 350 K. X-ray diffraction measurements of Ba2LaFeNb4O15 single crystals revealed an incommensurate structure at room temperature with a bidimensional modulation characterized by vectors q1 = (, , 1/2) and q2 = (, , 1/2) with = 0.295(1). This crystal growth method offers a promising elaboration route to centimeter-sized crystals of niobate-based compounds, which may not be grown from the pure liquid phase, especially those with a tetragonal tungsten bronze (TTB) structure.

引用

页码：2817 / 2825

页数：9

共 88 条

[1] DILATOMETRIC STUDY OF ORTHORHOMBIC-TETRAGONAL PHASE TRANSITION IN BARIUM SODIUM NIOBATE [J].