Browsing by Author "Karaca, I"
Now showing items 1-7 of 7
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AC losses and determination of some superconducting parameters of Ag2O added Bi2223 superconductors
The effects of Ag2O addition on electromagnetic properties in a Bi2223 superconductor have been investigated by means of AC susceptibility measurements and theoretical analysis. Intergranular critical current density was ... -
Effect of Ag2O addition on the intergranular properties of the superconducting Bi-(Pb)-Sr-Ca-Cu-O system
Karaca, I; Celebi, S; Varilci, A; Malik, AI (IOP PUBLISHING LTD, 2003)The effect of Ag2O addition on the Bi-(Pb)-Sr-Ca-Cu-O system has been investigated in terms of ac susceptibility, phase evolution, critical current density and critical temperature. It was found that as the amount of Ag2O ... -
Effect of growth rate and composition on the primary spacing, the dendrite tip radius and mushy zone depth in the directionally solidified succinonitrile-Salol alloys
Cadirli, E; Karaca, I; Kaya, H; Marasli, N (ELSEVIER SCIENCE BV, 2003)The succinonitrile (SCN)-Salol alloys for four different concentrations Salol were unidirectionally solidified for five different growth rates in a constant temperature gradient. The microstructure parameters, viz., the ... -
Fabrication and characterization of Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06O10 superconductors prepared by a wet technique
We have carried out measurements of resistivity on Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06O10 granular samples prepared by the liquid ammonium nitrate method. The standard four-probe technique was used to measure the resistivity ... -
Frequency dependence of the intergranular AC loss peak in a high-T-c Bi-(Pb)-Sr-Ca-Cu-O bulk superconductor
We have performed AC susceptibility measurements as a function of temperature; frequency and AC field amplitude on a rectangular bar shaped high-temperature superconductor with nominal composition of Bi1.8.4Pb0.34Sr1.91C ... -
Measurement of mass attenuation coefficients for YBaCuO superconductor at different energies
The mass attenuation coefficients for Y2O3, BaCO3, CuO compounds, and solid-state forms of YBa2Cu3O7 superconductor were determined at energies of 57.5. 59.5. 65.2, 74.8, 77.1, 87.3, 94.6, 98.4, 122, and 136 keV. The samples ... -
Production of BiPbSrCaCuO thin films on MgO and Ag/MgO substrates by electron beam deposition techniques
Varilci, A; Altunbas, M; Gorur, O; Karaca, I; Celebi, S (WILEY-V C H VERLAG GMBH, 2002)Superconducting BiPbSrCaCuO thin films were prepared on MgO(001) and Ag/MgO substrates using an electron beam (e-beam) evaporation technique. The effects of annealing temperature and Ag diffusion on the crystalline structure ...
