Hexagonal, Hysteresis

• Ba-Fe-O
• Fe-O-Sr
• Ba-Co-Fe-O
• Co-O-Zn
• Co-Sm
• magnetic hysteresis
• magnetic properties
• coercive field
• remanent induction
• remanent magnetization
• transitional
• ferromagnetic
• disordered
• ternary
• hard magnet