1985
DOI: 10.7567/jjaps.24s3.72
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Crystal Growth of Lithium Tetraborate (Li2B4O7)

Abstract: A good quality single crystal of Li2B4O7, up to 23 mm in diameter and 80 mm in length, has been successfully grown at a crystal pulling rate of 1 mm/h and the seed rotation rate of 6 r.p.m. by an automatic diameter control (ADC) of the Czochralski method. This crystal was very transparent and colourless, and possessed large regions free of any optical in homogeneity. Macroscopic defects such as cores appeared in some growing crystals have been discussed. Cores generated in growing crystals largely depended on … Show more

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Cited by 100 publications
(101 citation statements)
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“…соответствующей аппроксимации для тройных сплавов Al x Ga 1−x As из работы [16]. Расчетные спектры коэффициента оптического отра-жения для образцов BP2444 и ST1279 при нормальном падении представлены на рис.…”
Section: рисunclassified
“…соответствующей аппроксимации для тройных сплавов Al x Ga 1−x As из работы [16]. Расчетные спектры коэффициента оптического отра-жения для образцов BP2444 и ST1279 при нормальном падении представлены на рис.…”
Section: рисunclassified
“…1, for normal incidence, the localization length, as a function of the vacuum wavelength, in a RHM-RHM multilayered system of N = 10 6 double layers, with the localization length expressed in units of the average system length L = N d. For simplicity, we have used the same disorder amplitude for both slabs A and B, i.e., A = B = . Calculations were performed for a = b = 12 μm, and we have chosen the electric permittivities and magnetic permeabilities as in an air-silicon stack ( A = μ A = μ B = 1 and B = 13.18 27 ). Solid lines in Figs.…”
Section: A Rhm-rhm Nondispersive Systemsmentioning
confidence: 99%
“…The diffusion constant D was calculated from Hall and conductivity a, measurements taking into account the degeneration of two hole bands [7]. I n the calculations we used the constants for GaAs [8]. Fig.…”
Section: Samplesmentioning
confidence: 99%