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17O quadrupole coupling and the origin of ferroelectricity in isotopically enriched BaTiO3 and SrTiO3.

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F08%3A00322502" target="_blank" >RIV/68378271:_____/08:00322502 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    17O quadrupole coupling and the origin of ferroelectricity in isotopically enriched BaTiO3 and SrTiO3.

  • Original language description

    The 17O electric field gradient (EFG) and chemical shift tensors have been determined in the paraelectric and ferroelectric phases of isotopically enriched BaTiO3 and SrTiO3 single crystals via 17O NMR. The difference in the 17O chemical shifts between BaTiO3 and SrTiO3 is relatively small, whereas there is a large difference in the 17O EFG tensors even in the cubic phases. Density functional theory calculations indicate that the difference in the 17O EFGs is due to a crystal cell volume effect togetherwith effects due to the difference in ionic radii of Ba and Sr.

  • Czech name

    Kvadrupolová vazba na izotopu 17O a původ ferroelektricity v izotopicky obohaceném BaTiO3 a SrTiO3.

  • Czech description

    Prostřednictvím NMR na izotopu 17O byl stanoven gradient elektrického pole (EFG) na tomto izotopu a tenzory chemického posuvu v paraelektrické a ferroelektrické fázi izotopicky obohacených monokrystaleů BaTiO3 a SrTiO3. Rozdíl v chemickém posuvu v 17O mezi BaTiO3 a SrTiO3 je relativně malý, zatímco rozdíl v 17O EFG tensorech, a to dokonce i v kubických fázích je velký. Výpočty upozorňují, že rozdíl v 17O EFG je způsoben efektem objemu krystalové buňky spolu s efektem rozdílu v iontových poloměrech Ba aSr.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BM - Solid-state physics and magnetism

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Physics-Condensed Matter

  • ISSN

    0953-8984

  • e-ISSN

  • Volume of the periodical

    20

  • Issue of the periodical within the volume

    8

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    6

  • Pages from-to

  • UT code for WoS article

    000254100700008

  • EID of the result in the Scopus database