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Электронный каталог: Jabarov, S. H. - A-Site Cation Substitution Effects on Lattice Distortion and Open-Volume Defects in Nd–Ca/Sr and ...
Jabarov, S. H. - A-Site Cation Substitution Effects on Lattice Distortion and Open-Volume Defects in Nd–Ca/Sr and ...
Статья
Автор: Jabarov, S. H.
Micro and Nanostructures: A-Site Cation Substitution Effects on Lattice Distortion and Open-Volume Defects in Nd–Ca/Sr and ...
б.г.
ISBN отсутствует
Автор: Jabarov, S. H.
Micro and Nanostructures: A-Site Cation Substitution Effects on Lattice Distortion and Open-Volume Defects in Nd–Ca/Sr and ...
б.г.
ISBN отсутствует
На полку
Статья
Jabarov, S.H.
A-Site Cation Substitution Effects on Lattice Distortion and Open-Volume Defects in Nd–Ca/Sr and Pr–Ca Perovskite Manganites / S.H.Jabarov, S.F.Samadov, A.A.Sidorin, N.V.M.Trung, N.V.Tiep, [a.o.]. – Text : electronic // Micro and Nanostructures. – 2026. – Vol. 214. – P. 208659. – URL: https://doi.org/10.1016/j.micrna.2026.208659. – Bibliogr.: 60.
Half-doped perovskite manganites with Nd/Pr on the rare-earth site and Ca/Sr on the alkalineearth site were investigated to clarify how A-site cation chemistry governs crystal structure and open-volume defect states. Nd&sub(0.5)Ca&sub(0.5)MnO&sub(3), Nd&sub(0.5)Sr&sub(0.5)MnO&sub(3) and Pr&sub(0.5)Ca&sub(0.5)MnO&sub(3) were prepared and characterized by X-ray diffraction (XRD), Raman spectroscopy, positron annihilation lifetime spectroscopy (PALS), Doppler broadening annihilation spectroscopy, and electron momentum distribution (EMD) analysis. XRD confirms an orthorhombic perovskite structure for all compositions and reveals a systematic expansion of the unit-cell volume toward Sr-containing samples, consistent with the larger ionic radius of Sr&sup(2+). Raman spectra show more intense and betterresolved phonon modes for the Pr-based composition, indicating improved local structural order and modified Jahn–Teller distortions. PALS evidences a pronounced evolution of openvolume defects, with τmean positron lifetimes of 0.222 ns (Nd&sub(0.5)Ca&sub(0.5)MnO&sub(3)), 0.233 ns (Nd&sub(0.5)Sr&sub(0.5)MnO&sub(3)) and 0.207 ns (Pr&sub(0.5)Ca&sub(0.5)MnO&sub(3)), identifying the Sr-containing crystal as the most defect-rich. DB and EMD results further indicate that A-site substitution alters Mn–O bond hybridization and the degree of d-electron localization. Overall, the data demonstrate that A-site cation engineering provides a direct route to tune structure–defect–electronic correlations in halfdoped manganite perovskites, enabling targeted optimization for spintronic and sensing functionalities.
Спец.(статьи,препринты) = С 350 - Приложения методов ядерной физики в смежных областях
Спец.(статьи,препринты) = С 332.8 - Синхротронное излучение. Лазеры на свободных электронах. Получение и использование рентгеновских лучей
ОИЯИ = ОИЯИ (JINR)2026
Jabarov, S.H.
A-Site Cation Substitution Effects on Lattice Distortion and Open-Volume Defects in Nd–Ca/Sr and Pr–Ca Perovskite Manganites / S.H.Jabarov, S.F.Samadov, A.A.Sidorin, N.V.M.Trung, N.V.Tiep, [a.o.]. – Text : electronic // Micro and Nanostructures. – 2026. – Vol. 214. – P. 208659. – URL: https://doi.org/10.1016/j.micrna.2026.208659. – Bibliogr.: 60.
Half-doped perovskite manganites with Nd/Pr on the rare-earth site and Ca/Sr on the alkalineearth site were investigated to clarify how A-site cation chemistry governs crystal structure and open-volume defect states. Nd&sub(0.5)Ca&sub(0.5)MnO&sub(3), Nd&sub(0.5)Sr&sub(0.5)MnO&sub(3) and Pr&sub(0.5)Ca&sub(0.5)MnO&sub(3) were prepared and characterized by X-ray diffraction (XRD), Raman spectroscopy, positron annihilation lifetime spectroscopy (PALS), Doppler broadening annihilation spectroscopy, and electron momentum distribution (EMD) analysis. XRD confirms an orthorhombic perovskite structure for all compositions and reveals a systematic expansion of the unit-cell volume toward Sr-containing samples, consistent with the larger ionic radius of Sr&sup(2+). Raman spectra show more intense and betterresolved phonon modes for the Pr-based composition, indicating improved local structural order and modified Jahn–Teller distortions. PALS evidences a pronounced evolution of openvolume defects, with τmean positron lifetimes of 0.222 ns (Nd&sub(0.5)Ca&sub(0.5)MnO&sub(3)), 0.233 ns (Nd&sub(0.5)Sr&sub(0.5)MnO&sub(3)) and 0.207 ns (Pr&sub(0.5)Ca&sub(0.5)MnO&sub(3)), identifying the Sr-containing crystal as the most defect-rich. DB and EMD results further indicate that A-site substitution alters Mn–O bond hybridization and the degree of d-electron localization. Overall, the data demonstrate that A-site cation engineering provides a direct route to tune structure–defect–electronic correlations in halfdoped manganite perovskites, enabling targeted optimization for spintronic and sensing functionalities.
Спец.(статьи,препринты) = С 350 - Приложения методов ядерной физики в смежных областях
Спец.(статьи,препринты) = С 332.8 - Синхротронное излучение. Лазеры на свободных электронах. Получение и использование рентгеновских лучей
ОИЯИ = ОИЯИ (JINR)2026
