B-Er-Fe, Er-x polyhedra, Rare earth, Transitional

• B-Er-Fe-Mn
• B-Er-Fe-H
• B-Er-Fe-O
• B-Co-Er-Fe
• magnetic properties
• magnetization
• magnetic transitions
• magnetic moment
• structural properties
• rare earth
• transitional
• lanthanoid
• metalloid
• boride
• tetragonal
• hexagonal
• trigonal