Yazar "Öztürk, K." için listeleme
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Activation energy U(H) and pinning behavior of Yb-impurity-diffused YBa 2Cu 3O 7-x
Öztürk, K.; Çelik, Ş.; Yanmaz, E.; Savaşkan, B. (Wiley, 2007)Superconducting Y123 samples were prepared by the solid-state reaction (SSR) method. To get a layer of Yb (thickness ?4 ?m) on the surface of one side of the sample an ultrahigh-vacuum electron-beam deposition system was ... -
Anomalous ferromagnetic behaviour of Y2O3 and CuO nanoparticles in YBa2Cu3Oy superconductor
Basoğlu, M.; Öztürk, K.; Çelik, Şükrü; Grovenor, M.; Yanmaz, E. (Institute of Physics Publishing, 2009)Anomalous ferromagnetic behaviour of the Y2O3 and CuO components in YBa2Cu3Oy (Y123) was observed after severe reduction of particle size. The particle size reduction was performed in following way: Y2O3, BaCO3 and CuO ... -
Comparative study of critical current density, pinning force and levitation force behavior in Yb211 doped-Sm123 bulk superconductors
Öztürk, K.; Akbulut, S.; Kütük, S.; Bolat, S.; Çelik, Şükrü; Başoğlu, M. (Elsevier, 2012)The effect of Yb211 doping on the critical transition temperature (T c), c-lattice parameter, critical current density (J c), volume pinning force (F p) and the vertical levitation force density properties of MPMG-processed ... -
Dependency of c-lattice parameter, activation energy and its magnetic power constant on x in Y1-xYbx/2Gdx/2Ba2Cu3O7-y superconductors
Çelik, Şükrü; Öztürk, K.; Yanmaz, E. (Elsevier, 2008)To investigate the effect of x on c-lattice parameter, the activation energy, and the magnetic power constant of activation energy, the nominal composition of Y1-xYbx/2Gdx/2Ba2Cu3O7-y superconducting samples for x = 0.0, ... -
Determination of levitation force and pinning properties of (Sm123) 1-x(Yb211) x bulk superconductor depending on Yb211 doping ratio
Öztürk, K.; Çelik, Şükrü; Cansiz, A. (Wiley, 2009)The vertical force density curves of (Sm123) 1-x(Yb211)x high temperature superconductor (HTS) samples prepared by a meltpowder-melt-growth technique were measured during vertical and lateral traverses in zero field cooling ... -
Effects of x in Yb1-xGdxBa2Cu3O7-y samples on c-lattice parameter, activation energy and its magnetic power constant
Çelik, Şükrü; Öztürk, K.; Yanmaz, E. (Elsevier, 2008)The Yb1-xGdxBa2Cu3O7-y superconducting samples (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) which were prepared by solid-state reaction technique were studied to investigate the effect of x on c-lattice parameter, the activation ... -
Gadolinium diffusion-doping for enhancing activation energy in superconducting YBa2Cu3O7-x
Öztürk, K.; Çelik, Şükrü; Yanmaz, E. (Elsevier, 2008)The resistance transitions of Gd-diffused polycrystalline Y123 samples have been measured as a function of temperature and magnetic field. It is deduced from experimental results that the activation energy increases when ... -
Investigation of effect of x in Yb1-xGdxBa 2Cu3O7-y superconducting structures on upper critical magnetic field and coherence length
Çelik, Şükrü; Öztürk, K.; Yanmaz, E. (Institute of Physics Publishing, 2009)The resistivity measurements of the Yb1-xGdxBa 2Cu3O7-y superconducting samples prepared by using the solid-state reaction technique for x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 were performed in QD-PPMS system under different ... -
Investigation of some superconducting properties of ytterbium diffusion-doped YBa2Cu3O7-x superconductors
Öztürk, K.; Çelik, Şükrü; Çevik, U.; Yanmaz, E. (Elsevier, 2008)The effect of Yb diffusion on structural evolution and superconducting properties of YBa2Cu307-x (Y123) prepared in the bulk polycrystalline form were studied. The ytterbium (Yb) diffusion in superconducting Y123 ceramic ... -
Investigation of the dependency of the upper critical magnetic field on the content x in Y1-xYbx/2Gdx/2Ba2Cu3O7-y superconducting structures
Çelik, Şükrü; Öztürk, K.; Çevik, Uğur; Yanmaz, E. (Elsevier, 2008)The Y1-xYbx/2Gdx/2Ba2Cu3O7-y superconducting samples for x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 were prepared by using the solid-state reaction technique. Resistivity measurements of the samples were performed in QD-PPMS ... -
Levitation force at different temperatures and superconducting properties of nano-structured MgB2 superconductors
Yanmaz, E.; Öztürk, K.; Dancer, C.E.J.; Başoğlu, M.; Çelik, Şükrü; Grovenor, C.R.M. (Elsevier, 2010)The levitation and pinning force properties of nanocrystalline MgB2 superconductors prepared by a mechanical alloying technique with varying milling duration have been investigated. Levitation force measurements under ... -
Semiempirical equation of the levitation-force density for (Sm123) 1-x(Yb211) x superconducting samples
Çelik, S.; Öztürk, K. (0-Belirlenecek, 2009)After the preparation of Sm123 and Yb211 by melt-powder-melt growth and solid-state-reaction, respectively, the nominal compositions of (Sm123) 1-x(Yb211) x for x = 0.00, 0.05, 0.10, 0.15, 0.20 and 0.25 were prepared to ...