Gutierrez puebla

• Er-Fe-Ge-O
• Ba-Er-Ni-O
• Fe-Ge-Ho-O
• Ba-Ni-O-Y
• Ba-Ni-O-Yb
• structural properties
• magnetic properties
• magnetic susceptibility
• Curie-Weiss paramagnetism
• values of magnetic susceptibility
• chalcogen
• transitional
• non-disordered
• quaternary
• rare earth
• monoclinic
• orthorhombic
• tetragonal
• trigonal
• cubic