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Synthesis and electrophysical characterization of a three-phase Ca–Nd–Mn–Ni–O oxide system
Автор(ы)
Zhenisgul Imangalievna Sagintaeva
Shuga Bulatovna Kasenova
Bulat Kunurovich Kasenov
Erbolat Ermekovich Kuanyshbekov
Aigul Tanirbergenovna Ordabaeva
Дата публикации
25 июня 2026 г.
Тип
journal article
Издатель
Nature Portfolio
Журнал
Том
16
Выпуск
1
ISSN
2045-2322
Аннотация
The three-phase Ca-Nd-Mn-Ni-O oxide system was synthesized by a conventional solid-state ceramic method. The phase composition was investigated by X-ray diffraction (XRD) analysis using the PDF-5+/Rigaku SmartLab Studio II software package and was further confirmed by Rietveld refinement employing the GSAS-II software suite. According to the WPPF/Rietveld refinement results, the synthesized material predominantly consists of the Nd₀.₂₅Ca₁.₇₅MnO₄ phase (67.2 wt%), together with the perovskite-like Ca₀.₅Nd₀.₅Mn₀.₉₇Ni₀.₀₃O₃ phase (25.6 wt%) and a minor (Ni₀.₉₄Mn₀.₀₆)O phase (7.2 wt%). SEM analysis revealed an agglomerated granular morphology with porous regions, while elemental mapping confirmed the presence of Ca, Nd, Mn, Ni, and O in the synthesized material. FTIR spectroscopy showed characteristic metal-oxygen vibrational bands associated with [MnO₆] and [NiO₆] octahedral units. The electrical properties were investigated in the temperature range of 293-483 K at a frequency of 1 kHz. The material exhibited semiconducting behavior, and the calculated activation energies of electrical conduction were found to be 0.49 and 0.56 eV for the temperature intervals of 293-353 K and 393-483 K, respectively.
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Название
W7165953453.pdf
Описание
Полный текст в открытом доступе, лицензия cc-by-nc-nd; источник: https://www.nature.com/articles/s41598-026-59331-y_reference.pdf
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1,6 MB
Формат
Adobe PDF
Контрольная сумма
(MD5):8e6e2aaa8f030042f828d3cb3a966718