Перегляд за автором "Romanyuk, M.O."

Результати 1-9 з 9

Anisotropy of critical indices of ferroelectric phase transition in TGS crystals by the optical interference investigation

Andriyevsky, B.V.; Myshchyshyn, O.Ya.; Romanyuk, M.O. (Condensed Matter Physics, 1999)

Temperature dependences of the optical path difference, variable part of the refractive index and thickness of triglycine sulphate crystal for three crystallophysic directions are studied in the temperature range of 39–70 ...
Changes of anisotropy of dilatative and optical properties of DGN crystal at ferroelectric phase transition

Andriyevsky, B.V.; Romanyuk, M.O.; Dumka, Yu.A. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2003)

Temperature dependences of the linear dimension L(T) and the optical path difference D(T) of the ferroelectric diglycine nitrate crystals, (NH₂CH₂COOH)₂ HNO₃, have been measured for three principal directions of optical ...
Crystal optical method for temperature measuring

Romanyuk, M.O.; Andriyevsky, B.; Kostetsky, O.; Romanyuk, M.M.; Stadnyk, V. (Condensed Matter Physics, 2002)

A new crystal optical method for temperature measuring based on the sign inversion of birefringence ∆n and temperature dependence of ∆n(T) is substantiated. The respective characteristics of some crystals are presented, which ...
Evaluation of the fundamental absorption spectrum of a material by its refractive index dispersion in the transparency range

Andriyevsky, B.V.; Romanyuk, M.O.; Romanyuk, G.M. (Functional Materials, 2004)

A method has been elaborated to reconstruct the material absorption spectrum k(ω') in the ranges of fundamental excitations (ω') basing on the refractive index dispersion n(ω) in the material transparency range (ω). The ...
Peculiarities of refractive index dispersion of TGS crystals

Myshchyshyn, O.Ya.; Andriyevsky, B.V.; Romanyuk, M.O.; Kurlyak, V.Yu. (Condensed Matter Physics, 1999)

Based on solving the Kramers-Kronig integral equation, binding the spectrum of refractive index n(ω) of dielectric experimentally measured in the range of transparency (ω) and its spectrum of absorption index k(ω′) in ...
The baric changes of the refractive properties of K₂SO₄ crystals

Stadnyk, V.Yo.; Romanyuk, M.O.; Chyzh, O.Z.; Vachulovych, V.F. (Condensed Matter Physics, 2007)

The dependencies of the birefringence ∆ni of K₂SO₄ crystals in wide spectral (250–800 nm) ranges, as well as the effect of uniaxial mechanical stress on them have been studied. The values of ni for K₂SO₄ are found to be ...
The effect of external factors on dielectric permittivity of Rochelle salt: humidity, annealing, stresses, electric field

Slivka, A.G.; Kedyulich, V.M.; Levitskii, R.R.; Moina, A.P.; Romanyuk, M.O.; Guivan, A.M. (Condensed Matter Physics, 2005)

The effect of external factors, such as dessicating/wetting, thermal annealing, uniaxial and hydrostatic pressure, on the dielectric permittivity of Rochelle salt crystals is investigated. The obtained results are ...
The final stages of polarization and monodomain state stability of the Rochelle salt crystals

Romanyuk, M.O.; Romanyuk, M.M. (Condensed Matter Physics, 2002)

Based on the direct domain observations in the Rochelle salt crystals, the final stages of polarization and the dependence of polarized state stability on the electric field strength E and on the electric pulse duration ...
The refractometry of the uniaxially stressed ferroelectrics

Romanyuk, M.O.; Stadnyk, V.Yo. (Condensed Matter Physics, 1999)

The effect of uniaxial mechanical stresses upon the spectral and temperature dependences of birefringences in some ferroelectric crystals with the incommensurate phase are studied. Considerable baric displacements of ...

Результати 1-9 з 9

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Перегляд за автором "Romanyuk, M.O."

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