Magnetic and spin-phonon coupling studies of magneto-electric SrFe8Co2Ti2O19 M−type hexaferrite.

• The temperature dependent Raman studies of SrFe8Co2Ti2O19 M- type hexaferrite are reported. • Spin phonon coupling is observed in SrFe8Co2Ti2O19 Y- type hexaferrite. • The In-field Mossbauer spectroscpic studies confirm the Fe3 + ions distribution at different crystallographic sites. Structural, magnetic, in-field 57Fe Mössbauer and Raman studies of SrFe 8 Co 2 Ti 2 O 19 polycrystalline magneto-electric hexaferrite are reported in this article. From bulk magnetization measurements, a transition is observed at 330 K, which is ascribed to a conical like magnetic transition. The population of spin-up and spin-down sites at tetrahedral and octahedral sites are calculated from in-field 57Fe Mössbauer spectroscopic studies. Furthermore, the observed cation distribution suggests that the Co2+ ions occupy the spin-down 4f 2 octahedral site, which is reported to stabilize the conical magnetic structure and is expected to play an important role in the magneto-electric properties. Temperature-dependent Raman spectroscopy studies confirmed the spin-phonon coupling in the prepared sample. [ABSTRACT FROM AUTHOR]