@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

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              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.
            """ ;
    dct:identifier "NNT: 2013BOR14847" ;
    dct:issued "2026-05-07T18:23:50.606587"^^xsd:dateTime ;
    dct:language "fr" ;
    dct:modified "2026-05-07T18:23:50.606592"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Synthesis, structural and dielectric characterization of relaxor ceramics and single-crystals with TTB structure" ;
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    dcat:keyword "bronze-quadratique-de-tungstene",
        "chimothechemical-sciencesother",
        "croissance-cristalline",
        "crystal-growth",
        "crystal-structure",
        "dielectric-properties",
        "ferroelectric",
        "ferroelectrique",
        "infoeu-reposemanticsdoctoralthesis",
        "proprietes-dielectriques",
        "relaxeur",
        "relaxor",
        "structure-cristalline",
        "tetragonal-tungsten-bronze",
        "theses" ;
    dcat:landingPage <https://theses.hal.science/tel-00920357> .

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    dct:issued "2026-05-07T18:23:50.615009"^^xsd:dateTime ;
    dct:modified "2026-05-07T18:23:50.590499"^^xsd:dateTime ;
    dct:title "Synthesis, structural and dielectric characterization of relaxor ceramics and single-crystals with TTB structure" ;
    dcat:accessURL <https://theses.hal.science/tel-00920357> .

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