PDF Publication Title:
Text from PDF Page: 026
1.2 Physical properties of the RNiO3 system Figure 1.3: Band gap model for RE oxides - four types of the RE oxides: A - occupied and unoccupied f-states are located in the valence and conduction bands respectively, B - occupied f-states are located above valence band, unoccupied f- states are in the conduction band, C - occupied f-states are located in the valence band, unoccupied f-states are located below conduction band, D - occupied and unoccupied f-states are located inside the band gap (23) for TM silicates, as the free energy of formation of the former is about δG ≪ -100 kJ/mol as compared to δG ≈ −1 − 10kJ/mol for TM silicates(23). The in- termediate compounds are not present when oxides are deposited on Ge or GaAs surfaces. 1.2 Physical properties of the RNiO3 system 1.2.1 Crystallographic structure The correlation between crystallographic structure and physical properties is un- equivocally visible among the series of RNiO3 compounds. The size of correspond- ing rare earth ion influences mutual configurations of atoms in the perovskite-like unit cell of RNiO3 structure thus triggering changes in physical properties (76). Almost all RNiO3, apart from LaNiO3 (LNO) compounds have an orthorhom- bically distorted perovskite structure described by Pbnm space group (29, 78) in the metallic state. This crystalline structure is observed in compounds synthe- sized at high oxygen gas pressure. At lower pressures rhombohedral phase is favoured for NdNiO3 (NNO) (95). At the MIT this structural symmetry is low- 5PDF Image | Investigation of metal-insulator transition in magnetron sputtered samarium nickelate thin films
PDF Search Title:
Investigation of metal-insulator transition in magnetron sputtered samarium nickelate thin filmsOriginal File Name Searched:
Bilewska_Investigation_of_metal_insulator_transition_in_magnetron_sputtered_samarium.pdfDIY PDF Search: Google It | Yahoo | Bing
Sulfur Deposition on Carbon Nanofibers using Supercritical CO2 Sulfur Deposition on Carbon Nanofibers using Supercritical CO2. Gamma sulfur also known as mother of pearl sulfur and nacreous sulfur... More Info
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |