Materials (Apr 2020)

Magnetic Properties of La<sub>0.9</sub>A<sub>0.1</sub>MnO<sub>3</sub> (A: Li, Na, K) Nanopowders and Nanoceramics

  • Paweł Głuchowski,
  • Ruslan Nikonkov,
  • Robert Tomala,
  • Wiesław Stręk,
  • Tatsiana Shulha,
  • Maria Serdechnova,
  • Mikhail Zheludkevich,
  • Andrius Pakalaniškis,
  • Ramūnas Skaudžius,
  • Aivaras Kareiva,
  • Alexander Abramov,
  • Andrei Kholkin,
  • Maxim V. Bushinsky,
  • Dmitry Karpinsky

DOI
https://doi.org/10.3390/ma13071788
Journal volume & issue
Vol. 13, no. 7
p. 1788

Abstract

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Nanocrystalline La0.9A0.1MnO3 (where A is Li, Na, K) powders were synthesized by a combustion method. The powders used to prepare nanoceramics were fabricated via a high-temperature sintering method. The structure and morphology of all compounds were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). It was found that the size of the crystallites depended on the type of alkali ions used. The high-pressure sintering method kept the nanosized character of the grains in the ceramics, which had a significant impact on their physical properties. Magnetization studies were performed for both powder and ceramic samples in order to check the impact of the alkali ion dopants as well as the sintering pressure on the magnetization of the compounds. It was found that, by using different dopants, it was possible to strongly change the magnetic characteristics of the manganites.

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