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  • Investigation of structural, microstructural and magnetic properties of ▫${\rm Yb_xY_{1-x}F_3}$▫ solid solutions
    Aleksić, Jelena, materiali ...
    In this investigation, we have synthesized ▫${\rm Yb_xY_{1-x}F_3}$▫ solid solutions by fluorination of yttrium and ytterbium sesquioxides with ammonium hydrogen difluoride. According to the XRD ... analysis, all synthesized ▫${\rm Yb_xY_{1-x}F_3}$▫ samples have an orthorhombic crystal structure belonging to the ▫$\beta-{\rm YF_3}$▫ structural type. The refinement of crystal structure was done by the Rietveld method within the Pnma space group using the TCH pseudo-Voigt function. The anisotropic peak broadening was analyzed, and the average apparent crystallite size is about 50 nm with a small anisotropy of shape, while the significant microstrain that is highly anisotropic is present in all samples. The temperature-dependent magnetic susceptibility was analyzed by applying the model of a free ion perturbed by the crystal field. We have obtained the effective magnetic quantum numbers ▫$M_{ieff}$▫ of four Kramer's doublets of ▫${\rm Yb^{3+}}$▫ ion along with the entire crystal field splitting of the ▫$^2\mathrm{F}_{7/2}$▫ manifold of ▫$Yb^{3+}$▫ in ▫${\rm YF_3}$▫. The acquired maximum energy splitting of the ground level is about 150 K in our most diluted samples. The field-dependent isothermal magnetization measurements were carried out at various temperatures and analyzed by classical Langevin function. Results obtained from magnetic measurements show that all ▫${\rm Yb_xY_{1-x}F_3}$▫ ▫$(x \ne 0)$▫ solid solutions exhibit pure paramagnetic behavior in the whole temperature range from 2 to 300 K, with a predominant antiferromagnetic exchange interactions.
    Vir: The Journal of physics and chemistry of solids. - ISSN 0022-3697 (Vol. 142, July 2020, art. 109449 (8 str.))
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2020
    Jezik - angleški
    COBISS.SI-ID - 33274151

    Povezava(-e):

    https://doi.org/10.1016/j.jpcs.2020.109449
    DOI

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