Spin-phonon coupling in Ba₂Zn₂Fe₁₂O₂₂ Y-type hexaferrite

The spin-phonon coupling is frequently observed in magnetic materials and can be investigated using Raman spectroscopy. Surprisingly, there are no studies using Raman spectroscopy to confirm the existence of spin-phonon coupling in the Y-type Hexaferrite Ba₂Zn₂Fe₁₂O₂₂ (Zn₂Y), despite its ferrimagnetic nature. In this context, this paper aims to fill this gap. Raman spectra of Zn₂Y were measured from 296 K to 438 K, and a hardening of the mode at 660 cm^-¹ was observed near the Curie temperature. This behavior was associated with spin-phonon coupling.

Keywords:
Spin-phonon coupling; Hexaferrite; Raman spectroscopy