Structural, magnetic and magnetocaloric properties of double perovskites Ba2-xLaxFeMoO6

Characterization and Rietveld refinements of new dense ceramics Ba3−xSrxTb3−xCexO9 (x = 1 and 1.5) perovskites

“…For X-ray powder diffraction (XRPD) measurements, two factors are considered: (1) in general cases, the high-angle upper-limit 2 θ m is taken to be 120° or larger, which is apt to yield satisfactory refined results in the crystal structure refinement (Chen et al ., 1995) and (2) the possible ordering of Ba 2+ /Sr 2+ at the A-sites or Ce/Tb at the B-sites in the lattice will result in extra peaks, forming a so-called superstructure. The superstructure peaks with higher intensity are easier to be observed in the lower 2 θ range of 10–20°, such as for A-site-ordered perovskites (Li 1/2 Nd 1/2 )TiO 3 (Takahashi et al ., 1991) and (La 1/2 Na 1/2 )TiO 3 (Ioshiyuki et al ., 1992), as well as B-site-ordered perovskites Pb 2 CaTeO 6 (Artner and Weil, 2019), Ba 2 CaMoO 6 (Nguyen et al ., 2019), and Ba 2− x La x FeMoO 6 (Hussain et al ., 2019). For these two factors, the 2 θ ranges in XRPD spectra of BSTC1 and BSTC3/2 are expanded from 5° to 120° and no diffraction peaks between 5° and 20° were observed.…”

Recent development in shape memory based perovskite materials for energy conversion and storage applications

“…as mentioned in the above heading. Because of their excellent characteristics, perovskite oxides (PO) have good catalytic performance for the O 2 evolution reaction (OER) and O 2 reduction reaction (ORR), electrical properties, 25,26 and O 2 ion mobility over the crystal structure, 27 super magnetic properties, 28 insulating, metallic, and semiconducting behaviors. Because of its high electrical conductivity against lithium ions, PO is frequently used in energy storage systems.…”