Chalcogen, Conductor, Non-disordered, Cu-Fe-O, Trigonal

• Cu-Fe-Ni-O
• Cu-Fe-Gd-O
• Cu-Fe-Ho-O
• Cu-Fe-La-O
• magnetic properties
• electronic and electrical properties
• phase transitions
• structural transitions
• magnetization
• non-disordered
• chalcogen
• conductor
• delafossite
• oxide