We present the results of X-ray scattering studies of the charge and orbital ordering in the manganite series Pr 1 xCa xMnO 3 with x=0.25, 0.4 and 0.5. The polarization and azimuthal dependence of the charge and orbital ordering in these compounds are characterized both in the resonant and...
Based on first-principles calculations with the DFT + U method, the couplings of lattice, charge, spin, and electronic behaviors underlying the Eu-Mn charge transfer in a strongly correlated system of EuMnO3 were investigated. The potential valence transition from Eu3+/Mn3+ to Eu2+/Mn4+ was...
Influence of magnetic field on the paramagnetic-ferromagnetic transition in a La1−xCaxMnO3 (x≈0.25) crystal: Ultrasonic and transport studies The ultrasonic properties of La1−xCaxMnO3 (x≈0.25) with the Curie temperature TC about 200 K are studied. Temperature dependences of longitudinal an...
Lower limits to the electron affinities of the molecules O2, O3, NO, and NO2have been measured by determining the thresholds for endothermic charge transfer fromIto the corresponding molecules. The technique involves formation ofIby photoion‐pair formation and measurement of the intensity of the pr...
The artificial perovskite superlattices composed of LaMnO3 and SrMnO3 have been investigated to elucidate the interface electronic phases created by adjoining the two Mott insulators. Charge transfer at the interface due to chemical potential difference, as observed in p-n junctions of semiconductors, ...
A MnO double layer self-assembled at the interface between YMnO3and Al2O3, forming a new type of charge ordering. Multiferroic materials, which simultaneously have multiple orderings, hold promise for use in the next generation of memory devices. We report a novel self-assembled MnO double lay...
The electron spin resonance and magnetometry study of Nd2/3Ca1/3MnO3compound has been done.Phase segregated state of the compound below the charge ordering temperature was revealed.Charge ordered and charge disordered phases in varying proportions depending on the temperature are coexistent.The exchange...
Complex phase transitions, accompanied by changes in electronic and magnetic properties, occur in manganates with critical values of rA or bandwidth. Charge-ordering is found in layered manganates, BixCa1-xMnO3 and CaMnO3-δ. 展开 DOI: 10.1021/cm980318e 被引量: 163 ...
Co3O4 powder samples were prepared by thermal decomposition of Co(NO3)2 6H2O in the range of temperature from 200 to 800掳C. The point of zero charge (pzc) was measured by acid-base potentiometric titration in KNO3 solutions. The isoelec... C Pirovano,S Trasatti - 《Journal of Electroa...
The oxidation state of a transition metal in a crystal lattice is conventionally viewed as reflecting physical ionization: electrons have been transferred to or from the atom, leaving a point-like charged entity (ion). Such a picture is still sometimes i