Chemical Design of Copper-Oxide Superconductors: — Homologous Series and Oxygen Engineering —

Ordered Rock-Salt Related Nanoclusters in CaMnO2

“…By varying either or both of these characteristics the physicochemical properties can be tuned, giving the possibility of fabricating smart devices. Oxygen engineering, a term coined by M. Karppinen and H. Yamauchi to describe techniques for both controlling and determining the precise oxygen content, is a tool for on-demand tailoring of functional oxides into new superstructures and optimized performances. Investigations of tunability of oxygen deficiency and/or oxidation states of transition metals have been reported in perovskite-related materials.…”

Synthesis and Properties of Monoclinic and Cubic Forms of the A-Site-Ordered (BiMn3)Mn4O12 Perovskite

“…The present work has hence demonstrated an attractive but not-yet-utilized possibility to tailor the properties of the (A′A′′ 3 )B 4 O 12(δ -type ordered perovskite oxides by means of oxygen-content control or of oxygen engineering. 27…”

“…This suggests that monoclinic distortion (or a network of octahedral MnO 6 with cooperative JT distortion) assists the formation of a long-range magnetic ordering between the B-site Mn 3+ ions. The present work has hence demonstrated an attractive but not-yet-utilized possibility to tailor the properties of the (A′A′′ 3 )B 4 O 12±δ -type ordered perovskite oxides by means of oxygen-content control or of oxygen engineering …”

Introductory Chapter: Structure-Processing-Properties Relationships in Stoichiometric and Nonstoichiometric Oxides

“…There is a complex task for which a combination of different methods is required. The results of the classical methods for the composition analysis, e.g., iodometry, cerimetry or electroanalysis methods, should be correlated with the crystallographic structure and microstructure information coming from application of X-ray diffraction techniques, neutron diffraction, high-resolution electron microscopy (HRTEM), laser Raman spectroscopy (LRS) and electron paramagnetic resonance (EPR), together other advanced technique imaging at the atomic level and allowing a detailed study of local defect structures and chemistry, e.g., scanning transmission electron microscopy (STEM) and in situ electron energy loss spectroscopy (EELS) [47][48][49][50][51][52]. In addition, many advances have come by measuring the physical properties such as electrical conductivity, magnetic, optical, and optoelectronic properties that strongly depend on stoichiometry and on types and concentration of the defects.…”