Spin-phonon coupling in the incommensurate magnetic ordered phase of orthorhombic TmMnO3

EXAFS evidence for the spin–phonon coupling in the monoclinic PrNiO3 nickelate perovskite

“…34 In contrast to the view EXAFS studies reporting vibrational anomalies at the onset of the magnetic transitions, these anomalies have been widely reported from vibrational spectroscopy, including Raman and infrared techniques. 12,35,36 For instance, Granado et. al.…”

“…34 In contrast to the view EXAFS studies reporting vibrational anomalies at the onset of the magnetic transitions, these anomalies have been widely reported from vibrational spectroscopy, including Raman and infrared techniques. 12,35,36 For instance, Granado et al probed the temperature dependence of the Raman modes around the magnetic ordering temperatures in doped and undoped La 1Àx Mn x O 3 perovskite manganites, showing a well-distinguished softening below T N of the stretching mode of the [MnO 6 ] units. 12 These results were extended for different members of the manganite family, including RMnO 3 (R = Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y), where the role of the R cation size was established for the phonon softening behaviour: this effect is almost negligible for small R cations.…”

Dynamic characteristics of electric charge in HoxMn1–xS

“…Substitution of manganese with holmium ions with x = 0.05 leads to a sharp decrease in the paramagnetic Curie temperature by four times, to a change in magnetic properties [11]. The Ho 3+ ion has one electron in the 5d-shell, therefore, during hybridization of wave functions, it is possible to remove degeneracy in the t2g shell as a result of orbital ordering [12][13][14] or spin-phonon interaction, which will lead to a change in the magnetic state [15][16][17][18][19][20]. Note two unexplained facts in HoxMn1-xS.…”