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Brillouin scattering study of orthorhombic LiNiPO 4 single crystal
Author(s) -
Kurnosov V. S.,
Peschanskii A. V.,
Fomin V. I.,
Yeremenko A. V.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200622346
Subject(s) - orthorhombic crystal system , brillouin scattering , debye model , elastic modulus , brillouin spectroscopy , single crystal , crystal (programming language) , wavelength , materials science , analytical chemistry (journal) , refractive index , brillouin zone , brewster's angle , optics , light scattering , scattering , laser , crystallography , chemistry , crystal structure , condensed matter physics , brewster , physics , composite material , programming language , chromatography , computer science
Elastic moduli of LiNiPO 4 linear magnetoelectric single crystal were determined using Brillouin light scattering measurements at room temperature. The obtained values of the elastic moduli are the following: c 11 = 189.6 ± 0.2, c 22 = 192.6 ± 0.4, c 33 = 229.6 ± 0.2, c 44 = 58.9 ± 0.5, c 55 = 70.4 ± 0.6, c 66 = 75.7 ± 0.5, c 12 = 71.4 ± 0.9, c 13 = 71.0 ± 0.8, and c 23 = 54.5 ± 0.9 in units of 10 10 dyn/cm 2 . Determination of refractive indices at a He–Ne laser wavelength of 632.8 nm was also carried out by means of measurements of Brewster angle, and the following values were obtained: n a = 1.713 ± 0.003, n b = 1.698 ± 0.005, and n c = 1.709 ± 0.006. The estimation of the crystal Debye temperature θ D = 645 K was made using elastic constant values. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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