Browsing by Author "Napo, K."

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    The Bipolaron Model In Transport Properties Of Yba2cu3oy Superconductor Prepared By Adding Pr2co7 Magnetic Nanoparticles
    (University of Eloued جامعة الوادي, 2017-05-01) Mani Kongnine, D.; Hamrita, A.; Napo, K.
    Samples with the addition of ferromagnetic nanoparticles of Pr2Co7 on YBa2Cu3Oy (YBCO) polycrystalline superconductor were prepared by the standard solid state reaction method. The analysis of x-ray diffraction patterns by Rietveld refinement indicates orthorhombique to tetragonal phase transformation and oxygen rate reduction from x=0.3% of Pr2Co7 content. Resistivity at room temperature increases as Pr2Co7 content increases. The normal state resistivity versus temperature was analyzed properly by the bipolaron model. It suggested the increase of mobile charge localization with Pr2Co7 content.
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    Effect Of Annealing Treatments On Normal State Resistivity Of Yba2(cu1-xtix)3oy Superconductor In Bipolaron Model
    (University of Eloued جامعة الوادي, 2016-09-01) Mani Kongnine, D.; Hamrita, A.; Napo, K.
    Samples of YBa2(Cu1-xTix)3Oy superconductor with x=0.00 , 0.01, 0.03 have been prepared by solide state reaction method. The effect of annealing treatments on normal electrical resistivity has been done using the bipolaron model. The results of this study show the increase of localized charge when the dopant content increases and the reduction of this localization with annealing treatment.