On the structural and magnetic properties of the double perovskite $$\hbox {Nd}_{2}\hbox {NiMnO}_{6}$$

Abstract

The structural, electronic and magnetic properties of phase pure and stoichiometric samples of the double perovskite Nd 2 NiMnO 6 have been investigated with a combination of X-ray and neutron diffraction, X-ray photoelectron spectroscopy and magnetometry. It is found that the monoclinic space group P2 1 ∕n best describes the crystal structure of Nd 2 NiMnO 6. Photoectron spectroscopy revels a mixed valence of the transition metal sites where Ni has 3+/2+ oxidation states and Mn has 3+/4+. The compound orders ferromagnetically at ∼195 K. The magnetic structure was determined from the refinement of the neutron diffraction data. The results suggests that the B-site magnetic moments align along the crystallographic a-direction.

Redox Performance and Optimization of the Chemical Composition of Lanthanum–Strontium–Manganese-Based Perovskite Oxide for Two-Step Thermochemical CO2 Splitting

“…These results indicate that the valence state of La did not change during either step of the thermochemical cycle. For the double perovskite Nd 2 NiMnO 6 , the Ni 2p XPS profile shows the most prominent peak in the vicinity of 850-860 eV [64]. The Ni 2p 3/2 peak appeared at lower binding energies and higher intensities than the Ni 2p 1/2 peak [65].…”