Browsing by Author "Varilci, Ahmet"
Now showing items 1-20 of 76
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A-site Pb doping effect on structural, microstructural and magnetotransport properties of La0.5Sm0.2Ca0.3-xPbxMnO3 (x=0, 0.05, 0.10) manganite
Denbri, Fatih; Mahamdioua, Nabil; Meriche, Faiza; Koç, Nevin Soylu; Terzioğlu, Cabir; Varilci, Ahmet; Altıntaş, Sevgi Polat (Elsevier Science SA, 2021)Structural, microstructural and magneto-transport properties of polycrystalline La0.5Sm0.2Ca0.3-x PbxMnO3 (x = 0, 0.05 and 0.10) samples, prepared by conventional solid state reaction, were studied. Refinement of the Powder ... -
Anisotropic nature and scaling of thermally activated dissipation mechanism in Bi-2223 superconducting thin film
Yıldırım, Gürcan; Varilci, Ahmet; Terzioğlu, Cabir (Elsevier Science Sa, 2013)This study deals with the resistive transition of the c-axis oriented Bi-2223 thin film produced on the single crystal MgO (100) substrate using direct current (DC) magnetron reactive sputtering technique at 100 watt in ... -
Comparative study of nano-sized particles CoFe2O4 effects on superconducting properties of Y-123 and Y-358
Slimani, Yassine; Hannachi, Essia; Ben Salem, M. K.; Hamrita, A.; Varilci, Ahmet (Elsevier, 2014)The effects of nano sized CoFe2O4 particles (10 nm) addition on the structural and the normal state resistivity of YBa2Cu3O7 (noted Y-123) and Y3Ba5Cu8O18 (noted Y-358) polycrystalline were systematically studied. Samples ... -
Determination of solid solubility level of Ho nanoparticles in Y-123 superconducting matrix and strong Cu-1 site preference of nanoparticles
Sarıtekin, Namık Kemal; Zalaoğlu, Yusuf; Yıldırım, Gürcan; Doğruer, Musa; Terzioğlu, Cabir; Varilci, Ahmet; Görür, Osman (Elsevier Science Sa, 2014)This comprehensive study reports the effect of the Ho inclusions on the microstructural, electrical, mechanical and superconducting characteristics of YBa2Cu3O7-delta ceramic superconductors with the aid of standard ... -
Diffusion coefficient, activation energy and the effect of Ag-doping on some physical properties of silver doped Bi1.8Pb0.4Ca2.2Sr2Cu3Ox
Akdoğan, Mustafa; Terzioğlu, Cabir; Varilci, Ahmet; Belenli, İbrahim (Elsevier Science Bv, 2010)The aim of the present study is to investigate the effect of diffusion-doped silver on some physical properties of Bi1.8Pb0.4Ca2.2Sr2Cu3Ox superconducting samples and to calculate the diffusion coefficient and the activation ... -
The effect of ag diffusion on properties of YBa2CU3O7-x thin films produced by electron beam deposition techniques
Görür, Osman; Küçükömeroğlu, Tayfur; Terzioğlu, Cabir; Varilci, Ahmet; Altunbaş, Mustafa (Elsevier Science Bv, 2005)Superconducting YBa2Cu3O7-x thin films were prepared on pure MgO and Ag/MgO substrates (without and with Ag buffer layer) using an electron beam evaporation technique. The effects of isothermal annealing temperature and ... -
Effect of annealing temperature on some physical properties of MgB2 by using the hall probe ac-susceptibility method
Varilci, Ahmet; Yeğen, Dinçer; Tassi, M.; Stamopoulos, D.; Terzioğlu, Cabir (Elsevier Science Bv, 2009)A commercially available powder of MgB2 is used as starting material for the examination of the influence of the annealing temperature on the properties of this intermediate-T-c superconductor. We performed scanning electron ... -
Effect of annealing time and temperature on microstructural and superconducting properties of (Bi,Pb)-2212 thin films produced by magnetron reactive sputtering
Yıldırım, Gürcan; Bal, Sevgi; Varilci, Ahmet (Springer, 2012)This study deals with the role of various annealing time (1 h, 2 h, 4 h, 6 h and 8 h) and temperature (840 and 850 degrees C) on the microstructural and superconducting properties of thin films with the aid of scanning ... -
Effect of Ce addition on the magnetoresistivity, irreversibility field, upper critical field and activation energies of Bi-2212 superconducting ceramics
Yıldırım, Gürcan; Doğruer, Musa; Öztürk, Özgür; Varilci, Ahmet; Terzioğlu, Cabir; Zalaoğlu, Yusuf (Springer, 2012)This study aims to analyze the effect of Ce addition on the microstructural, superconducting and physical properties of Bi1.8Sr2.0Ce (x) Ca1.1Cu2.1O (y) ceramics with x=0, 0.001, 0.003, 0.005, 0.01, 0.03, 0.05 and 0.1 via ... -
Effect of diffusion-annealing time (0.5 h <= t <= 2 h) on the mechanical and superconducting properties of Cu-diffused bulk MgB2 superconductors by use of experimental and different theoretical models
Doğruer, Musa; Zalaoğlu, Yusuf; Yıldırım, Gürcan; Varilci, Ahmet; Terzioğlu, Cabir (Springer, 2013)This study reports the effect of different annealing time (0.5 h a parts per thousand currency sign t a parts per thousand currency sign 2 h) on the electrical, physical, microstructural, mechanical and superconducting ... -
Effect of doping by low content of yttrium at Ca and Sr sites of Bi(Pb)-2212 superconducting ceramics
Amira, Abderrezak; Boudjadja, Y.; Saoudel, A.; Varilci, Ahmet; Akdoğan, Mustafa; Terzioğlu, Cabir (Elsevier, 2011)In this work, a comparative study of the effect of doping bylaw content of Y3+ between (Ca site) and out of (Sr site) the CuO2 planes of Bi(Pb)-2212 phase is presented. Ceramics of Bi1.6Pb0.4Sr2Ca1-xYxCu2O8+d (called CY ... -
Effect of Eu doping on structural and magneto-electrical properties of La0.7Ca0.3MnO3 manganites
Altıntaş, Sevgi Polat; Amira, A.; Mahamdioua, N.; Varilci, Ahmet; Terzioğlu, Cabir (Elsevier Science Sa, 2011)We have investigated the influence of europium (Eu) doping on structural and magneto-electrical properties of La0.7Ca0.3MnO3 compounds. In order to analyze the physical mechanism of a spin disorder system and study their ... -
Effect of fluorine doping on phase formation and properties of Bi(Pb)-2223 ceramics
Amira, A.; Saoudel, A.; Boudjadja, Y.; Amirouche, L.; Mahamdioua, N.; Varilci, Ahmet; Akdoğan, Mustafa; Terzioğlu, Cabir (Elsevier Science Bv, 2011)Superconducting ceramics of Bi1.6Pb0.4Sr2Ca2Cu3OyFx (x = 0-0.6) are prepared in air by conventional solid state reaction and characterized. The study shows that the melting point of the samples decreases as fluorine content ... -
Effect of Gd addition on the activation energies of Bi-2223 superconductor
Erdem, M.; Öztürk, Özgür; Yücel, E.; Altıntaş, Sevgi Polat; Varilci, Ahmet; Terzioğlu, Cabir; Belenli, İbrahim (Elsevier Science Bv, 2011)We have investigated the effect of addition of Gd in Bi1.8Pb0.35Sr1.9Ca2.1Cu3GdxOy superconductor with x=0, 0.1, 0.2, 0.3, 0.4 and 0.5. The samples were prepared using the standard solid-state reaction method. The activation ... -
Effect of magnetic field direction on magnetoresistivity, activation energy, irreversibility and upper critical field of Bi-2212 thin film fabricated by DC sputtering method
Yıldırım, Gürcan; Bal, Sevgi; Varilci, Ahmet (Springer, 2012)This study aims to investigate the effect of magnetic field direction on superconducting properties of Bi-2212 thin film fabricated on MgO (100) substrate using the direct current (DC) magnetron reactive sputtering technique ... -
Effect of Mn addition on structural and superconducting properties of (Bi, Pb)-2223 superconducting ceramics
Yıldırım, Gürcan; Bal, S.; Yücel, Ersin; Doğruer, Musa; Akdoğan, Mustafa; Varilci, Ahmet; Terzioğlu, Cabir (Springer, 2012)This study deals with the effect of Mn addition on the structural and superconducting properties of Bi1.8Pb0.4Sr2Mn (x) Ca2.2Cu3.0O (y) ceramics with x=0,0.03,0.06,0.15,0.3 and 0.6 by means of X-ray analysis (XRD), scanning ... -
The effect of Nd (2) O (3) addition on superconducting and structural properties and activation energy calculation of Bi-2212 superconducting system
Öztürk, Özgür; Aşıkuzun, Elif; Coşkunyürek, Murat; Soylu, Nevin; Hancerlioğulları, Aybaba; Varilci, Ahmet; Terzioğlu, Cabir (Springer, 2014)The effect of Nd (2) O (3) addition on the micro-structural and the superconducting properties of Bi-2212 superconductor ceramics, prepared by solid state reaction method, was analyzed by performing X-ray diffraction (XRD), ... -
Effect of Re doping on structure and magneto-electrical properties of La1.2Re0.2Ca1.6Mn2O7 manganites
Mahamdioua, Nabil; Amira, Abderrezak; Altıntaş, Sevgi Polat; Varilci, Ahmet; Terzioğlu, Cabir (Elsevier, 2013)In this paper, the structural and magneto-electrical properties of the double layered La12Re0.2Ca1.6Mn2O7 manganites doped with Re=La, Pr, Eu, Y and Gd are presented. The results show that the decreasing of the ionic radii ... -
The effect of Sm substitution on properties of Bi1.6Pb0.4Sr2Ca2-xSmxCu3Oy superconductors
Yılmazlar, Mustafa; Aydın, Hüseyin; Varilci, Ahmet; Terzioğlu, Cabir (Springer, 2007)The effect of the partial substitution of Ca by Sm in the Bi-2223 superconducting samples have been investigated in terms of X-ray diffraction (XRD), EDXRF (Energy Dispersive X-ray Fluorescent), magnetoresistivity, critical ... -
The effect of TlF3 substitution on the weak links behaviour and AC susceptibility of Bi1.8-xTlxPb0.35Sr2Ca2Cu3OyF3x superconductors
Saoudel, Abdelmalek; Amira, Abderrezzak; Boudjadja, Yazid; Mahamdioua, Nabil; Varilci, Ahmet (Elsevier Sci Ltd, 2018)We have studied the thallium fluoride (TlF3) doping and AC field dependence of the weak links behaviour and AC susceptibility of Bi1.8-xTlxPb0.35Sr2Ca2Cu3OyF3x superconductors with range of x = 0, 0.05, 0.10 and 0.15. The ...
