Synthesis, structural and dielectric characterization of relaxor ceramics and single-crystals with TTB structure
type: Dataset
contact point: Organization
  fn: CCSD
keyword: ferroelectric
keyword: bronze-quadratique-de-tungstene
keyword: crystal-structure
keyword: relaxeur
keyword: theses
keyword: croissance-cristalline
keyword: crystal-growth
keyword: chimothechemical-sciencesother
keyword: infoeu-reposemanticsdoctoralthesis
keyword: relaxor
keyword: dielectric-properties
keyword: proprietes-dielectriques
keyword: ferroelectrique
keyword: structure-cristalline
keyword: tetragonal-tungsten-bronze
landing page: https://theses.hal.science/tel-00920357
description: Tetragonal Tungsten Bronze structure, thanks to its compositional flexibility, is a legitimate candidate for the development of functional materials. Study of dielectric, pyroelectric, and ferroelectric properties of Ba2NdFeNb4-xTaxO15 ceramics reveals a relaxor-ferroelectric-paraelectric crossover, with thermal hysteresis of the ferroelectric transition. Structural analysis of Ba2LnFeNb4O15 (Ln=La Pr, Nd, Sm, Eu), relaxor single crystals obtained by flux method, highlighted a modulated structure. Refinement of the basic structure proves the existence of a dipolar moment in the ab plane (induced by a distortion of [NbO6] octahedra). In order to establish a correlation between the crystal structure and the properties of a compound derived from multiferroic MnWO4, the crystal growth in image furnace of Mn0,85Mg0,15WO4 was successfully undertaken.
identifier: NNT: 2013BOR14847
issued: 2026-05-07T18:23:50.606587
language: fr
modified: 2026-05-07T18:23:50.606592

Synthesis, structural and dielectric characterization of relaxor ceramics and single-crystals with TTB structure
type: Distribution
access URL: https://theses.hal.science/tel-00920357
format: HTML
issued: 2026-05-07T18:23:50.615009
modified: 2026-05-07T18:23:50.590499

test_moissonnage_selune
type: Agent