A-site ordered state in manganites with perovskite-like structure based on optimally doped compounds Ln0.70Ba0.30MnO3 (Ln = Pr, Nd)
Trukhanov S. V., Khomchenko V. A., Karpinsky D. V., Silibin M. V., Trukhanov A. V., Lobanovsky L. S., Szymczak H., Botez C. E., Troyanchuk I. O.
Journal of Rare Earths
Vol.37, Issue11, P. 1242-1249
Опубликовано: 2019
Тип ресурса: Статья
DOI:10.1016/j.jre.2018.12.010
Аннотация:
In this paper, we report on the crystal structure and magnetic properties of the nanostructured Ba-ordered phases of rare-earth manganites obtained from the optimally doped solid solutions Ln0.70Ba0.30MnO3 (Ln = Pr, Nd). The materials were studied by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy and SQUID-magnetometry techniques. It is found that states with different degrees of cation ordering in the A-sublattice of the ABO3 perovskite can be obtained by employing special conditions of chemical treatment. In particular, reduction of the parent compounds results in the formation of a nanocomposite containing ferrimagnetic anion-deficient ordered phase LnBaMn2O5. Oxidation of the composite does not change an average size of the nanocrystallites, but drastically alters their phase composition to stabilize ferromagnetic stoichiometric ordered phase LnBaMn2O6 and ferromagnetic superstoichiometric disordered phase Ln0.90Ba0.10MnO3+δ. It is shown that the ma
Ключевые слова:
Ionic order; Magnetic transition; Manganite; Perovskite; Rare earths
Energy dispersive spectroscopy; Ferromagnetic materials; Ferromagnetism; Magnetic properties; Magnetometry; Manganites; Perovskite; Phase composition; Positive ions; Rare earths; Scanning electron microscopy; ABO3 perovskites; Chemical treatments; Disordered phase; Ionic order; Magnetic transitions; Perovskite like structure; Rare-earth manganite; SQUID magnetometry; Crystal structure
Язык текста: Английский
ISSN: 1002-0721
Trukhanov S. V.
Khomchenko V. A.
Karpinsky D. V.
Silibin M. V. Maksim Viktorovich 1983-
Trukhanov A. V.
Lobanovsky L. S.
Szymczak H.
Botez C. E.
Troyanchuk I. O.
Труханов С. В.
Хомченко В. А.
Карпинскy Д. В.
Силибин М. В. Максим Викторович 1983-
Труханов А. В.
Лобановскy Л. С.
Сзyмcзак Х.
Ботез C. Е.
Троянчук И. О.
A-site ordered state in manganites with perovskite-like structure based on optimally doped compounds Ln0.70Ba0.30MnO3 (Ln = Pr, Nd)
Текст визуальный непосредственный
Journal of Rare Earths
Elsevier Science Publisher B.V.
Vol.37, Issue11 P. 1242-1249
2019
Статья
Ionic order Magnetic transition Manganite Perovskite Rare earths
Energy dispersive spectroscopy Ferromagnetic materials Ferromagnetism Magnetic properties Magnetometry Manganites Perovskite Phase composition Positive ions Rare earths Scanning electron microscopy ABO3 perovskites Chemical treatments Disordered phase Ionic order Magnetic transitions Perovskite like structure Rare-earth manganite SQUID magnetometry Crystal structure
In this paper, we report on the crystal structure and magnetic properties of the nanostructured Ba-ordered phases of rare-earth manganites obtained from the optimally doped solid solutions Ln0.70Ba0.30MnO3 (Ln = Pr, Nd). The materials were studied by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy and SQUID-magnetometry techniques. It is found that states with different degrees of cation ordering in the A-sublattice of the ABO3 perovskite can be obtained by employing special conditions of chemical treatment. In particular, reduction of the parent compounds results in the formation of a nanocomposite containing ferrimagnetic anion-deficient ordered phase LnBaMn2O5. Oxidation of the composite does not change an average size of the nanocrystallites, but drastically alters their phase composition to stabilize ferromagnetic stoichiometric ordered phase LnBaMn2O6 and ferromagnetic superstoichiometric disordered phase Ln0.90Ba0.10MnO3+δ. It is shown that the ma