Magnetic behavior and structural analysis of hexagonal Lu1-xBaxMn0.5Fe0.5O3 (0 ≤ x ≤ 0.3) perovskite

FLORENCIA LURGO; GERMÁN TIRAO; SILVINA LIMANDRI; RAÚL CARBONIO

Washington

Congreso; DXC- 69th Annual Denver X-Ray Conference; 2020

ICDD

In this work we studied the magnetic behavior of the perovskite (with ABO3 nominal formula) familyLu1-xBaxMn0.5Fe0.5O3 (0 ≤ x ≤ 0.3) synthetized by a wet chemical method. The structural analysis was carried outby X-ray powder diffraction (XRPD) with Rietveld analysis. These analyses revealed that all the samples show ahexagonal rearrangement with space group P63cm and the increase Ba content, increase the lattice parameters.With high resolution X-ray emission spectroscopy (HR-XES) we studied the change of the valence states of thecation Mn consequence of the Ba2+-doping; this information was obtained by measuring changes in some spectralfeatures, such as energy shifts, possible satellite lines, line shapes and relative intensities. For 3d transitionelements, the high-resolution Kβ spectrum shows a clear sensitivity to the chemical environment1. These spectrawere measured using a non-conventional spectrometer with conventional X-ray sources2. X-ray photoelectronspectroscopy (XPS) was used to investigate and confirmed the change Mn+3-Mn+4 in the Lu1−xBaxMn0.5Fe0.5O3samples. The magnetization as a function of the temperature reveals an unusual a magnetic behaviour. This effectis attributed to the increase of the concentration of Mn+4 with the increasing of the Ba content. The magneticbehaviour of this perovskites with the cation Lu and Mn in the A site is due for the Dzyaloshinskii-Moriya (DM)interactions between the cations in the B site. The change in the valence state of the Fe or Mn cations change theDM interactions and also the magnetic behaviour.