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Hall anomaly in CNT-doped Y-123 high temperature superconductor

Dadras, S ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.physc.2010.01.041
  3. Publisher: 2010
  4. Abstract:
  5. In order to study the Hall effect in pure and CNT-doped Y-123 polycrystalline samples, we have measured the longitudinal and transverse voltages at different magnetic field (0 - 9 T) in the normal and vortex states. In the normal state, the Hall coefficient is positive and decreases with increasing temperature, and can be approximately fitted to RH = a + bT-1. We have found a sign reversal in the pure sample for the magnetic field of about 3 T, and double sign reversal of the Hall coefficient in the 0.7 wt% CNT-doped sample at about 3 and 5 T. The Hall resistivity in our samples depends on the pinning
  6. Keywords:
  7. Carbon nano-tube doping ; Hall anomaly sign reversal ; YBa2Cu3O7-δ ; Different-magnetic fields ; Doped sample ; Hall anomaly ; Hall coefficient ; Hall resistivity ; Normal state ; Polycrystalline samples ; Sign reversal ; Vortex state ; Hall effect ; High temperature superconductors ; Magnetic field effects ; Nanotubes ; Doping (additives)
  8. Source: Physica C: Superconductivity and its Applications ; Volume 470, Issue 5-6 , 2010 , Pages 309-312 ; 09214534 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0921453410000572