منابع مشابه
Growth and characterizations of Ba2Ti2Fe2As4O single crystals
Single crystals of a new iron-based superconductor Ba2Ti2Fe2As4O have been grown successfully via a Ba2As3-flux method in a sealed evacuated quartz tube. Bulk superconductivity with Tc ∼ 21.5 K was demonstrated in resistivity and magnetic susceptibility measurements after the as-grown crystals were annealed at 500 °C in vacuum for a week. X-ray diffraction patterns confirm that the annealed and...
متن کاملGROWTH OF ZnS SINGLE CRYSTALS BY CVT TECHNIQUE UNDER DIFFERENT MASS TRANSPORT STABILITY CONDITIONS
Abstract: A thermodynamic model was used to find out the optimum temperature for the growth of ZnS single crystals in closed ampoules by chemical vapor transport technique. Based on this model 1002 °C was found to be optimum temperature for 2 mg/cm3 concentration of transporting agent (iodine). ZnS Crystals were grown in optimum (1002 °C) and non-optimum (902 °C and 1102 °C) temperatures. The c...
متن کاملGrowth and Properties of Single Crystals of Noncentrosymmetric Na3VO2B6O11
Anew nonlinear optical crystal, Na3VO2B6O11, has been grown by the top-seeded solution growthmethod using a Na2CO3-V2O5 flux. The structure of the compound was determined by single-crystal X-ray diffraction. It crystallizes in the noncentrosymmetric orthorhombic system, space groupP212121, with cell parameters a=7.7359(9) Å, b=10.1884(12) Å, c= 12.5697(15) Å, V= 990.7(2) Å, and Z= 4. Na3VO2B6O1...
متن کاملFloating-zone growth of KxFe2-ySe2 single crystals
The discovery of superconductivity at temperatures above 30 K in KxFe2-ySe2 compounds has attracted considerable attention [1]. The crystal structure of KxFe2-ySe2 descends from the well-known ThCr2Si2 structure with vacancies at the Fe sites. It was soon found that magnetism and superconductivity coexist in AxFe2-ySe2 (A = K, Rb, and Cs) [2-3]. Even in single crystals which show full shielding...
متن کاملGrowth and Characterization of Lead-free Piezoelectric Single Crystals
Lead-free piezoelectric materials attract more and more attention owing to the environmental toxicity of lead-containing materials. In this work, we review our first attempts of single crystal grown by the top-seeded solution growth method of BaTiO₃ substituted with zirconium and calcium (BCTZ) and (K0.5Na0.5)NbO₃ substituted with lithium, tantalum, and antimony (KNLSTN). The growth methodology...
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ژورنال
عنوان ژورنال: Journal of the Mineralogical Society of Japan
سال: 1981
ISSN: 1883-7018,0454-1146
DOI: 10.2465/gkk1952.15.136