Abstract
Multiferroic Ba1.6Sr1.4Co2Fe24O41 with Z-type hexagonal structure was obtained through the proteic sol–gel process with a majoritary phase by thermic treatment at 1200°C for 2h. Raman spectroscopy showed significant abnormalities in the position and intensity of the vibrational modes as a function of increasing temperature. The intensity and Raman shift versus temperature showed three peaks at around 375K, 563K, and 683K. Strong spin–phonon coupling was identified through Raman spectroscopy and is related to three magnetic changes: conical→planar, planar→uniaxial, and ferromagnetic→paramagnetic.
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