Zobrazeno 1 - 10
of 12
pro vyhledávání: '"A. V. Yeganyan"'
Autor:
Karine Hovhannesyan, N. V. Kuleshov, A. S. Rudenkov, Viktor Kisel, A. V. Yeganyan, Ashot Petrosyan, M. V. Derdzyan
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 55:131-136
Single crystals of yttrium orthoaluminate activated with Yb3+ ions (YAlO3:Yb) are of high interest for diode pumped high-power ultrafast lasers emitting in the spectral range around 1 µm. The major parameters of lasers achieved so far can be improve
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences)
Journal of Contemporary Physics (Armenian Academy of Sciences), Allerton Press, 2021, 56 (1), pp.22-24. ⟨10.3103/S1068337221010138⟩
Journal of Contemporary Physics (Armenian Academy of Sciences), Allerton Press, 2021, 56 (1), pp.22-24. ⟨10.3103/S1068337221010138⟩
International audience; New expressions have been obtained to estimate the graphene thermal conductivity coefficient as well as characteristic dependences of coefficient of thermal conductivity on temperature and linear coefficient of thermal expansi
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences)
Journal of Contemporary Physics (Armenian Academy of Sciences), Allerton Press, 2019, 54 (3), pp.302-307. ⟨10.3103/S1068337219030113⟩
Journal of Contemporary Physics (Armenian Academy of Sciences), Allerton Press, 2019, 54 (3), pp.302-307. ⟨10.3103/S1068337219030113⟩
In this paper, by an analogy with the 3D-systems, and because of the analysis of the dimensionalities of the variables involved, an expression is derived in the quasi-harmonic approximation that allows one to estimate the linear thermal expansion coe
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 53:152-156
Simple expressions were obtained for the thermal expansion coefficients of the rare-earth garnets, which allow to estimate their values in a wide temperature range in cases, when either the lattice unit cell parameters or the density of the material
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 52:387-391
At high temperatures, the simple expression for thermal conductivity of crystals with the garnet structure is obtained, which allows one to determine this quantity if the lattice constant or density of these crystals is known. The thermal conductivit
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 51:61-64
Expressions for estimation of the thermal linear expansion coefficients and of the thermal conductivities of amorphous dielectrics above the Debye temperature are obtained. It is shown that for the compounds of the chemical composition corresponding
Autor:
Karine Hovhannesyan, Christophe Dujardin, M.V. Derdzyan, Ashot Petrosyan, A. V. Yeganyan, R. V. Sargsyan, Artur Novikov
Publikováno v:
CrystEngComm
CrystEngComm, Royal Society of Chemistry, 2018, 20 (11), pp.1520-1526. ⟨10.1039/c7ce02194a⟩
CrystEngComm, Royal Society of Chemistry, 2018, 20 (11), pp.1520-1526. ⟨10.1039/c7ce02194a⟩
International audience; Using a combination of experimental methods, the substitution tendencies of Li+ and involved charge compensation mechanisms are determined and compared in two important similar scintillators, LuAG:Ce and YAG:Ce. The studies we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5fa32d26f9e6ae1acf6bab54b61daccd
https://hal.archives-ouvertes.fr/hal-02287417
https://hal.archives-ouvertes.fr/hal-02287417
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 50:79-83
With the view of goal-directed search for materials with required value of thermal expansion coefficient a generalized expression for approximate estimation of the coefficient of thermal linear expansion of solid crystalline dielectrics at temperatur
Autor:
Ashot Petrosyan, K. L. Ovanesyan, G. R. Badalyan, V. S. Stathopoulos, R. V. Sargsyan, Armen S. Kuzanyan, V. S. Kuzanyan, A. V. Yeganyan
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 49:220-227
Conditions of preparation, by the method of solid state reactions, of rare-earth hexaaluminates RE1−x−yMxM’yMgAl11O19 (RE = La, Sm; M, Mt’ = Gd, Yb, Lu, Y, Sc; x, y = 0, 0.15, 0.3), were investigated. For a number of compositions, high-degree
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 49:176-179
A generalized expression for approximate estimation of lattice component of thermal conductivity coefficient for solid-state crystal dielectrics at temperatures higher than the Debye temperature, is obtained, which is convenient for preliminary estim