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Antiferromagnetic materials with strong spin-phonon coupling have thepotential for spintronic applications. Here, we report the structural,magnetic, and vibrational properties of 12R-BaTi0.4Mn0.6O3.Temperature-dependent magnetization data show the presence of weakantiferromagnetic interactions. Correlation between magnetic and vibrationalproperties are probed by using temperature-dependent Raman spectroscopicmeasurements. Two of the Raman active phonons show deviation from anharmonicbehaviour at low temperatures which can be attributed to spin-phonon coupling.The strength of coupling is estimated using mean-field approximation and isfound to be 1.1 and 1.2 cm-1 for phonons at 530 and 717 cm-1, respectively.

Signatures of Weak Spin-Phonon Coupling in 12R-BaTi0.4Mn0.6O3: A Raman Study