International Physics Conference.St. Petersburg, October 21-25, 2024, St. Petersburg
Spectroscopy of condensed matter

X-ray spectral studies of manganese-doped bismuth-zinc tantalates

S. V. Nekipelov^ab, N. A. Zhuk^ba, O. V. Petpova^b, V. N. Sivkov<sup>b

a</sup> Syktyvkar State University, Syktyvkar, Russia
^b Komi Scientific Center of Ural Branch of RAS, Syktyvkar, Russia

Abstract: Thermally stable pyrochlores of bismuth tantalates doped with manganese and zinc atoms were obtained: Bi$_2$Zn$_x$Mn$_{1-x}$Ta$_2$O$_{9.5-\Delta}$ ($x$ = 0.3, 0.7). According to XPS and NEXAFS spectroscopy, it was established that the ions in these solid solutions are in the charge states Bi (+3-$\delta$), Zn(+2), Ta (+5-$\delta$), and the manganese ions in the samples have predominantly an oxidation state 2$^+$ and 3$^+$, while the share of the lat-ter increases with increasing manganese content.

Keywords: bismuth tantalates, pyrochlores, XPS, nexafs.

Received: 27.04.2024
Revised: 07.06.2024
Accepted: 30.10.2024

DOI: 10.61011/OS.2024.11.59494.6436-24

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