Hexagonal, Negative thermal expansion, Rare earth

• Er-Fe
• Al-Fe-Y
• C-Co-Lu-N
• C-Co-N-Y
• C-Co-Ho-N
• magnetic properties
• magnetization
• thermal and thermodynamic properties
• structural properties
• magnetic transitions
• transitional
• negative thermal expansion
• rare earth
• non-disordered
• ferromagnetic