Magnetization Anisotropy in YBCO Superconductors Prepared MPMG Method


Celebi S., Kutuk S. , BOLAT S., ÖZTÜRK A.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.25, ss.267-271, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 25 Konu: 2
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1007/s10948-011-1295-1
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Sayfa Sayıları: ss.267-271

Özet

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 gamma 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 Hayenc and HaSyenc, respectively. Calculations based on the critical-state model can reproduce quite well the experimental data for Hayenc and HaSyenc where we have chosen n=0.15 and n=0.3, respectively.