Počet záznamů: 1  

Incorporation of the Ce.sup.3+./sup. activator ions in LaAlO.sub.3./sub. crystals: EPR and NMR study

  1. 1.
    0559410 - FZÚ 2023 RIV US eng J - Článek v odborném periodiku
    Laguta, Valentyn - Buryi, Maksym - Pejchal, Jan - Uličná, K. - Římal, V. - Chlan, V. - Štěpánková, H. - Zagorodniy, Y. - Nikl, Martin
    Incorporation of the Ce3+ activator ions in LaAlO3 crystals: EPR and NMR study.
    Journal of Solid State Chemistry. Roč. 313, Sep (2022), č. článku 123295. ISSN 0022-4596. E-ISSN 1095-726X
    Grant CEP: GA ČR(CZ) GA20-12885S
    Institucionální podpora: RVO:68378271
    Klíčová slova: EPR and NMR * LaAlO3:Ce * spin transfer * Fermi contact interaction
    Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
    Impakt faktor: 3.3, rok: 2022
    Způsob publikování: Omezený přístup
    https://doi.org/10.1016/j.jssc.2022.123295

    This work reports the results of EPR and NMR study of the Ce3þ incorporation in LaAlO3 single crystals grown by the micro-pulling-down method in the range of the Ce concentrations in the solid solution La1-xCexAlO3 from x ¼ 0.001 up to x ¼ 1.0. From EPR measurements, Ce3þ g tensor parameters were determined as a function of Ce concentration. The g tensor has an orthorhombic symmetry even in the trigonal phase (x < 0.1) suggesting that the incorporation of Ce at La site lowers the lattice symmetry near this ion. The local properties of the La1-xCexAlO3 crystals were further studied by 27Al and 139La high-resolution NMR measurements. It was found that 139La chemical shift has the Fermi contact interaction origin. It linearly increases with the Ce concentration from 0 ppm up to 165 ppm at x ¼ 0.5. Due to this strong Fermi contact interaction, separated peaks corresponding to different Ce–O–La spin transfer passways are resolved in the 139La NMR spectra.
    Trvalý link: https://hdl.handle.net/11104/0333384

     
     
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.