22Aug 2017

INFLUENCE OF Pr2Co7 MAGNETIC NANOMETER PARTICLES ADDITION ON YBa2Cu3Oy SUPERCONDUCTOR MAGNETO-CONDUCTIVITY'S IN FLUCTUATION REGIME.

  • Departement de Physique, Facult? des Sciences, Universit? de Lom?, BP 1515, Lom?, Togo.
  • D?partement de Physique, Facult? des Sciences de Bizerte, Zarzouna 7021, Universit? de Carthage, Bizerte, Tunisie.
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We perform magneto-conductivity fluctuation study on polycrystalline samples of YBa2Cu3Oy (YBCO) superconductor added with x% (x=0.0, 0.1 and 0.3) in weigh of magnetic nanometer particles (20 nm) of Pr2Co7. Standard solid state reaction method is used to elaborate samples. X-ray diffraction patterns refinement by Rietveld method show the orthorhombic to tetragonal phase transition from 0.3% wt of Pr2Co7 addition. Magneto-resistance measurements are performed in magnetic field ranging from 0 to 40 mT, orthogonal to current. The magneto-conductivity fluctuation is analyzed assuming excess conductivity in magnetic field follows power law. The results show two steps of transition. The pairing transition above T_P (maximum of temperature derivative of resistivity) and the coherence transition below T_P. Transition width goes large for each samples when magnetic field increases and is more higher in samples containing Pr2Co7. Above T_P, the fluctuation regime in presence of magnetic field is not changed in comparison to the results obtained out of magnetic field. Magneto-conductivity fluctuation analysis near zero resistance temperature, T_CO, shows two critical regimes with samples containing 0.0% and 0.1% in weight of Pr2Co7 but only one critical regime in sample containing 0.3% wt of Pr2Co7.

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[D. Mani Kongnine, M. Baneto, K. Tepe, A. Hamrita and K. Napo. (2017); INFLUENCE OF Pr2Co7 MAGNETIC NANOMETER PARTICLES ADDITION ON YBa2Cu3Oy SUPERCONDUCTOR MAGNETO-CONDUCTIVITY'S IN FLUCTUATION REGIME. Int. J. of Adv. Res. 5 (Aug). 1412-1417] (ISSN 2320-5407). www.journalijar.com

MANI KONGNINE Damgou
Département de Physics - Faculté des Sciences - Université de Lomé - BP1515 Lomé-TOGO

DOI:

Article DOI: 10.21474/IJAR01/5198      
DOI URL: https://dx.doi.org/10.21474/IJAR01/5198

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