Chalcogen, Non-disordered, Fe-O, Optics

• Bi-Fe-O
• Fe-La-O
• Fe-Ni-O
• Co-Fe-O
• phonons
• optical spectra
• wavenumber of optical phonon
• Raman spectra
• optical absorption
• chalcogen
• non-disordered
• transitional
• oxide
• antiferromagnetic
• cubic
• trigonal
• orthorhombic
• tetragonal
• monoclinic