Araujo moreira

• Ba-Cu-Fe-La-O
• Ba-Cu-Fe-Lu-O
• Ba-Cu-Fe-O-Tm
• Ba-Co-Cu-La-O
• Ce-Cu-Gd-O-Ru-Sr
• magnetic properties
• magnetic susceptibility
• values of magnetic susceptibility
• structural properties
• Moessbauer spectra
• transitional
• chalcogen
• rare earth
• lanthanoid
• alkaline
• orthorhombic
• tetragonal
• cubic