Abstract
We present a short review on phonon anomalies near magnetic ordering in magnetic materials using the noticed Raman shifts and any change in intensities near such magnetic ordering. The observed variation in specific optical phonon modes is discussed considering the spin-orbital-phonon coupling in various systems. The consequences of spin-orbital-phonon coupling include the impact on bond strength, which results in specific phonon mode anomalies near magnetic ordering. There are several experimental observations based on temperature-dependent Raman and IR spectroscopic measurements in the vicinity of magnetic ordering temperature, suggesting a crucial spin-phonon coupling in certain materials, giving rise to the exotic physical properties such as magnetoelectric, and piezomagnetic effects in such materials. The review will discuss the microscopic origin of spin-orbital-phonon coupling in these systems.
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