Structure and magnetism of mixed-valent iron oxysulfides Sr3Fe4O6S2 (Sr3(Fe3+)2O5(Fe2+)2OS2) and Sr4Fe4O7S2 (Sr4(Fe3+)2O6(Fe2+)2OS2)

Key Points

• The research aims to investigate the crystal and magnetic structures of two mixed-valent iron oxysulfides, Sr3Fe4O6S2 and Sr4Fe4O7S2.
• Utilized a building-block approach for the design of compounds.
• Characterized the crystal structures of Sr3Fe4O6S2 and Sr4Fe4O7S2 using X-ray diffraction techniques.
• Analyzed magnetic properties through magnetometry.
• Both compounds exhibit a fully charge-ordered configuration.
• Fe2+ and Fe3+ ions are organized in specific patterns contributing to their magnetic behavior.