Funct. Mater. 2020; 27 (2): 238-244.

doi:https://doi.org/10.15407/fm27.02.238

Ca4YO(BO3)3:Er,Yb single crystals: structure peculiarities and anisotropy of physical and mechanical properties

E.A.Vovk1, E.F.Dolzhenkova1, V.N.Baumer2, A.N.Shekhovtsov1, S.V.Nizhankovskyi1, S.I.Kryvonohov1, A.A.Kozlovskyi1, V.V.Baranov1, I.M.Pritula1

1Institute for Single Crystals, STC "Institute for Single Crystals" National Academy of Sciences of Ukraine, 60 Lenin Ave., 61001 Kharkiv, Ukraine
2STC "Institute for Single Crystals", National Academy of Sciences of Ukraine, 60 Lenin Ave., 61072 Kharkiv, Ukraine

Abstract: 

YCOB:Er (2 at.%), Yb (20 at.%) single crystal with a diameter of 15 mm and a length of 55 mm was grown by the Czochralski method. The crystal structure of the obtained sample was specified by the method of powder diffractometry. Type I and type II microhardness anisotropy was studied by the Vickers method for the faces (010) and (111). Inhomogeneity of the mechanical properties of YCOB crystal was shown to be defined by the orientation of the boron-oxygen bonds in the crystal lattice.

Keywords: 
oxiborate, Czochralski method, x-ray diffraction analysis, microhardness anisotropy.

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