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Vacancies and spin–phonon coupling in CrSi 0.8 Ge 0.1 Te 3
Author(s) -
Milosavljević Ana,
Šolajić Andrijana,
Višić Bojana,
Opačić Marko,
Pešić Jelena,
Liu Yu,
Petrovic Cedomir,
Popović Zoran V.,
Lazarević Nenad
Publication year - 2020
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.5962
Subject(s) - condensed matter physics , raman spectroscopy , raman scattering , ferromagnetism , phonon , van der waals force , coupling (piping) , spin (aerodynamics) , magnetization , symmetry (geometry) , materials science , chemistry , physics , magnetic field , molecule , geometry , mathematics , organic chemistry , quantum mechanics , optics , metallurgy , thermodynamics
We report temperature‐dependent Raman scattering and magnetization studies of van der Waals ferromagnetic compound CrSi 0.8 Ge 0.1 Te 3 . Magnetic susceptibility measurements revealed dominant ferromagnetic interactions below T C which shift to the lower values due to the presence of vacancies. A Raman active mode, additional to the ones predicted by symmetry in the parent compounds, has been observed. This A g symmetry mode most likely emerges as a consequence of the atomic vacancies on Si/Ge site. Presence of the strong spin–phonon coupling at temperature around 210 K is indicated by deviations from conventional phonon self‐energy temperature dependence of all analysed modes.