Antiferroelectric, Chalcogen, Ba-Cu-Fe-O-Y, Orthorhombic

• Ba-Cu-Fe-O-Y-Zn
• Ba-Co-Cu-Fe-O-Y
• superconductivity
• superconducting transition temperature
• magnetic properties
• values of superconducting transition temperature
• Moessbauer spectra
• antiferroelectric
• antiferromagnetic
• chalcogen
• charge-density wave state
• alkaline