Unvailing the spin–phonon coupling in nanocrystalline BiFeO3 by resonant two-phonon Raman active modes
Само за регистроване кориснике
2021
Аутори
Stojadinović, BojanĐokić, Dejan M.
Paunović, Novica
Živković, Ivica
Ćirić, Luka
Kusigerski, Vladan
Dohčević-Mitrović, Zorana
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
We report on temperature dependence of two-phonon Raman spectra in BiFeO3 nanocrystals, above and below the Néel temperature TN using a resonant laser excitation line (λ=532 nm). Two-phonon modes exhibited anomalous frequency hardening and deviation from the anharmonic decay below TN. Such behavior strongly supported the existence of spin-two-phonon interaction, because these modes are known to be very sensitive to the antiferromagnetic ordering. Within the mean-field theory for the nearest-neighbor interaction, the linear relationship between spin–spin correlation function and observed two-phonon frequency shift below TN was obtained. This approach enabled to quantify the spin–phonon interaction by spin–phonon coupling strength for both two-phonon modes and justified the application of mean-field approach. Magnetic measurements revealed the coexistence of antiferromagnetic and weak ferromagnetic phases below TN, which were found non competitive, additionally supporting the mean-field ...approach from which we deduced that the two-phonon modes in BiFeO3 are correlated with antiferromagnetic ordering below TN.
Кључне речи:
BiFeO nanomaterials / Magnetic measurements / Raman spectroscopy / Sol–gel processes / Spin–phonon interactionsИзвор:
Materials Science and Engineering: B, 2021, 274, 115444-Финансирање / пројекти:
- Ministry of Education,Science, and Technological Development of the Republic of Serbia
DOI: 10.1016/j.mseb.2021.115444
ISSN: 0921-5107
WoS: 000709391100003
Scopus: 2-s2.0-85115797509
Колекције
Институција/група
VinčaTY - JOUR AU - Stojadinović, Bojan AU - Đokić, Dejan M. AU - Paunović, Novica AU - Živković, Ivica AU - Ćirić, Luka AU - Kusigerski, Vladan AU - Dohčević-Mitrović, Zorana PY - 2021 UR - https://vinar.vin.bg.ac.rs/handle/123456789/9956 AB - We report on temperature dependence of two-phonon Raman spectra in BiFeO3 nanocrystals, above and below the Néel temperature TN using a resonant laser excitation line (λ=532 nm). Two-phonon modes exhibited anomalous frequency hardening and deviation from the anharmonic decay below TN. Such behavior strongly supported the existence of spin-two-phonon interaction, because these modes are known to be very sensitive to the antiferromagnetic ordering. Within the mean-field theory for the nearest-neighbor interaction, the linear relationship between spin–spin correlation function and observed two-phonon frequency shift below TN was obtained. This approach enabled to quantify the spin–phonon interaction by spin–phonon coupling strength for both two-phonon modes and justified the application of mean-field approach. Magnetic measurements revealed the coexistence of antiferromagnetic and weak ferromagnetic phases below TN, which were found non competitive, additionally supporting the mean-field approach from which we deduced that the two-phonon modes in BiFeO3 are correlated with antiferromagnetic ordering below TN. T2 - Materials Science and Engineering: B T1 - Unvailing the spin–phonon coupling in nanocrystalline BiFeO3 by resonant two-phonon Raman active modes VL - 274 SP - 115444 DO - 10.1016/j.mseb.2021.115444 ER -
@article{ author = "Stojadinović, Bojan and Đokić, Dejan M. and Paunović, Novica and Živković, Ivica and Ćirić, Luka and Kusigerski, Vladan and Dohčević-Mitrović, Zorana", year = "2021", abstract = "We report on temperature dependence of two-phonon Raman spectra in BiFeO3 nanocrystals, above and below the Néel temperature TN using a resonant laser excitation line (λ=532 nm). Two-phonon modes exhibited anomalous frequency hardening and deviation from the anharmonic decay below TN. Such behavior strongly supported the existence of spin-two-phonon interaction, because these modes are known to be very sensitive to the antiferromagnetic ordering. Within the mean-field theory for the nearest-neighbor interaction, the linear relationship between spin–spin correlation function and observed two-phonon frequency shift below TN was obtained. This approach enabled to quantify the spin–phonon interaction by spin–phonon coupling strength for both two-phonon modes and justified the application of mean-field approach. Magnetic measurements revealed the coexistence of antiferromagnetic and weak ferromagnetic phases below TN, which were found non competitive, additionally supporting the mean-field approach from which we deduced that the two-phonon modes in BiFeO3 are correlated with antiferromagnetic ordering below TN.", journal = "Materials Science and Engineering: B", title = "Unvailing the spin–phonon coupling in nanocrystalline BiFeO3 by resonant two-phonon Raman active modes", volume = "274", pages = "115444", doi = "10.1016/j.mseb.2021.115444" }
Stojadinović, B., Đokić, D. M., Paunović, N., Živković, I., Ćirić, L., Kusigerski, V.,& Dohčević-Mitrović, Z.. (2021). Unvailing the spin–phonon coupling in nanocrystalline BiFeO3 by resonant two-phonon Raman active modes. in Materials Science and Engineering: B, 274, 115444. https://doi.org/10.1016/j.mseb.2021.115444
Stojadinović B, Đokić DM, Paunović N, Živković I, Ćirić L, Kusigerski V, Dohčević-Mitrović Z. Unvailing the spin–phonon coupling in nanocrystalline BiFeO3 by resonant two-phonon Raman active modes. in Materials Science and Engineering: B. 2021;274:115444. doi:10.1016/j.mseb.2021.115444 .
Stojadinović, Bojan, Đokić, Dejan M., Paunović, Novica, Živković, Ivica, Ćirić, Luka, Kusigerski, Vladan, Dohčević-Mitrović, Zorana, "Unvailing the spin–phonon coupling in nanocrystalline BiFeO3 by resonant two-phonon Raman active modes" in Materials Science and Engineering: B, 274 (2021):115444, https://doi.org/10.1016/j.mseb.2021.115444 . .