Abstract
We have studied magnetization anisotropy in a YBa2Cu3O7 sample synthesized by a modified melt powder melt growth (MPMG) method. Magnetization of the sample upon ZFC process was measured as a function of magnetic field oriented both parallel and perpendicular to the c-axis. Magnetization anisotropy parameter γ is determined from remanent magnetization as a function of temperature. Magnetic relaxation measurement has been carried out in selected magnetic fields in both field increasing and decreasing case. At 20 kOe and 25 K for the field increasing case, the activation energy was found to be 53.5 meV and 51.7 meV when H∥c and H⊥c, respectively. Calculations based on the critical-state model can reproduce quite well the experimental data for H∥c and H⊥c where we have chosen n=0.15 and n=0.3, respectively.
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Çelebi, S., Kütük, S., Bolat, S. et al. Magnetization Anisotropy in YBCO Superconductors Prepared MPMG Method. J Supercond Nov Magn 25, 267–271 (2012). https://doi.org/10.1007/s10948-011-1295-1
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DOI: https://doi.org/10.1007/s10948-011-1295-1