Spin-phonon coupling in Gd(Co1/2Mn1/2)O3 perovskite
R. X. Silva, H. Reichlova, X. Marti, D. A. B. Barbosa, M. W. Lufaso,, A. P. Ayala, C. W. A. Paschoal
TL;DR
This study explores how magnetic and lattice vibrations interact in Gd(Co1/2Mn1/2)O3 perovskite ceramics, revealing spin-phonon coupling near the ferromagnetic transition at 120 K and its dependence on structural order.
Contribution
It provides the first detailed analysis of spin-phonon coupling in Gd(Co1/2Mn1/2)O3, linking magnetic transitions with lattice dynamics and structural order.
Findings
Spin-phonon coupling observed near 120 K.
Structural order influences the strength of spin-phonon coupling.
Orthorhombic Pnma symmetry confirmed in samples.
Abstract
We have investigated the temperature-dependent Raman-active phonons and the magnetic properties of Gd(Co1/2Mn1/2)O3 perovskite ceramics in the temperature range from 40 K to 300 K. The samples crystallized in an orthorhombic distorted simple perovskite, whose symmetry belongs to the Pnma space group. The data reveals spin-phonon coupling near the ferromagnetic transition occurring at around 120 K. The correlation of the Raman and magnetization data suggests that the structural order influences the magnitude of the spin-phonon coupling.
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