Department of Physics

18102  Advanced Laboratory   

Course webpage: https://eclass.uoa.gr/courses/PHYS223/

Course Content

• Superconductors of low critical temperature: Theory of superconductivity, Type I & II superconductors, Abrikosov vortex lattice, phase diagrams (H-T) of vortex matter, applications.
• Superconductors of high critical temperature: Chemical compounds of cupper oxides YBa₂Cu₃O_7-δ and Bi_2-yPb_ySr_2.0Ca_n-1Cu_nO_2n+4, properties of single-crystalline/poly-crystalline samples, synthesis/processing in poly-crystalline form of YBa₂Cu₃O_7-δ with δ≈0.05 and Bi_2-yPb_ySr_2.0Ca_n-1Cu_nO_2n+4 with y≈0.4& n≈3.
• Crystal structure: Diffraction from periodic crystal structures, investigation of a poly-crystalline sample YBa₂Cu₃O_7-δ or Bi_2-yPb_ySr_2.0Ca_n-1Cu_nO_2n+4 with X-Ray powder diffraction (XRPD) and with the Rietveld method: phase identification and determination of lattice parameters.
• Magnetic properties: Ac magnetic susceptibility (1Oe≤Η_ac≤20Oe, 1Hz≤f_ac≤1kHz) of YBa₂Cu₃O_7-δ with δ≈0.05 (Η_dc=0Oe) and Bi_2-yPb_ySr_2.0Ca_n-1Cu_nO_2n+4 with y≈0.4& n≈3 (0Oe≤Η_dc≤1000Oe), phase diagram and underlying physical mechanisms.
• Electric properties: Resistivity (10μΑ≤I_dc≤10mΑ) of YBa₂Cu₃O_7-δ with δ≈0.05 (Η_dc=0Oe) and Bi_2-yPb_ySr_2.0Ca_n-1Cu_nO_2n+4 with y≈0.4& n≈3 (0Oe≤Η_dc≤1000Oe), critical current, phase diagram and underlying physical mechanisms.
• Research report: Writing of a research report, formal presentation of the report in a seminar class.