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Current issue   Ukr. J. Phys. 2014, Vol. 58, N 9, p.853-856
https://doi.org/10.15407/ujpe58.09.0853    Paper

Stadnyk V.Yo., Kashuba O.Z., Brezvin R.S., Matviishyn I.M., Rudysh M.Y.

Ivan Franko National University of L’viv
(8, Kyrylo i Mefodiy Str., Lviv 79005, Ukraine; e-mail: vasylstadnyk@ukr.net)

Birefringence Properties of Uniaxially Compressed K2SO4 crystal

Section: Solid matter
Original Author's Text: Ukrainian

Abstract: The influence of the uniaxial mechanical pressure ?m ? 200 bar on the temperature dependence of the birefringence ?ni in K2SO4 crystals in an interval of 300–1000 K has been studied. The uniaxial pressure was found to affect only the magnitude but not the behavior of d?ni/dT. A significant baric shift of the ferroelastic phase transition point toward higher (for ?x) and lower (for ?y and ?z pressures) temperatures was observed, as well as a baric shift of the temperature interval, where the intermediate phase exists, near the phase transition point.

References:

  1. A. Jonh and Mc.M. Ginnety, Acta Crystallogr. B 28, 2845 (1972).
     https://doi.org/10.1107/S0567740872007022
  2. A.J. Berg and F. Tuinstra, Acta Crystallogr. B 34, 3177 (1972).
     https://doi.org/10.1107/S0567740878010432
  3. M. Miyake and S. Iwai, Phys. Chem. Minerals 7, 211 (1981).
     https://doi.org/10.1007/BF00311891
  4. H. Arnold and W. Kurtz, Ferroelectrics 25, 557 (1980).
     https://doi.org/10.1080/00150198008207069
  5. I.S. Zheludev, V.M. Gaba, N.A. Romanyuk, and Z.M. Ursul, Izv. Akad. Nauk SSSR Ser. 7, 386 (1986).
  6. N.A. Romanyuk, V.M. Gaba, Z.M. Ursul, and V.I. Stadnik, Opt. Spektrosk. 62, 94 (1987).
  7. V.I. Stadnik, N.A. Romanyuk, and O.Z. Chizh, Opt. Spektrosk. 102, 514 (2007).
     https://doi.org/10.1134/S0030400X07040078
  8. V.Yo. Stadnyk, M.O. Romanyuk, O.Z. Chyzh, and V.F. Vachulovych, Cond. Matter Phys. 10, 45 (2007).
  9. V.Yo. Stadnyk and M.O. Romanyuk, Ferroelectrics 317, 255 (2005).
  10. V.Yo. Stadnyk, M.O. Romanyuk, M.R. Tuzyak, and V.Yu. Kurlyak, Ukr. J. Phys. 54, 587 (2009).
  11. V.Yo. Stadnyk, O.S. Kushnir, R.S. Brezvin, and V.M. Gaba, Opt. Spektrosk. 106, 614 (2009).
  12. W. Eysel, H. H¨ofer, K. Keester et al., Acta Crystallogr. B 41, 5 (1985).
     https://doi.org/10.1107/S0108768185001501
  13. K.S. Aleksandrov and B.V. Beznosikov, Structural Phase Transitions in Crystals (Potassium Sulfate Family) (Nauka, Novosibirsk, 1993) (in Russian).
  14. B.V. Beznosikov and K.S. Aleksandrov, Preprint No. 304F (L.V. Kirenskii Institute of Physics, Krasnoyarsk, 1985) (in Russian).
  15. Y. Makita, A. Sawada, and Y. Takagi, J. Phys. Soc. Jpn. 41, 167 (1976).
     https://doi.org/10.1143/JPSJ.41.167
  16. A. Sawada, Y. Makita, and Y. Takagi, J. Phys. Soc. Jpn. 41, 174 (1976).
     https://doi.org/10.1143/JPSJ.41.174