Short-range antiferromagnetic interaction and spin-phonon coupling in La.sub.2./sub.CoMnO.sub.6./sub. double perovskite

0565426 - FZÚ 2023 RIV NL eng J - Journal Article
Silva, R.X. - Santos, C.C. - Reichlová, Helena - Martí, Xavier - Paniago, R. - Paschoal, C.W.A.
Short-range antiferromagnetic interaction and spin-phonon coupling in La₂CoMnO₆ double perovskite.
Vibrational Spectroscopy. Roč. 123, Nov (2022), č. článku 103426. ISSN 0924-2031. E-ISSN 1873-3697
Institutional support: RVO:68378271
Keywords : Raman spectroscopy * spin-phonon coupling * double perovskites * antisite disorder
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.5, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.vibspec.2022.103426

Weak antiferromagnetic (AFM) interaction in the ferromagnetic (FM) partially ordered La2CoMnO6 (LCMO) was detected by Raman spectroscopy by monitoring spin-phonon coupling. Because of the sensibility to probe short-range disorder and lattice modifications, the Raman spectroscopy showed to be an useful tool to indicate less remarkable magnetic transitions in LCMO compound. Apart from the expected spin-phonon coupling due to the long-range FM superexchange (Tc ∼230 K), phonons parameters pointed out an additional spin-phonon coupling related to the short-range AFM interaction at Tc ∼135 K, which was not detected from the magnetic bulk response. These results reinforce the Raman spectroscopy as a powerful technique to detect antisite disorder into A2B′B’’O6 magnetic double perovskites, whose magnetic properties are driven by superexchange interactions.
Permanent Link: https://hdl.handle.net/11104/0336951