Ferromagnetism and Charge Order from a Frozen Electron Configuration in Strained Epitaxial LaCoO3

Voltage-controlled ferromagnetism and magnetoresistance in LaCoO3/SrTiO3 heterostructures

Ferromagnetic insulating state in tensile-strained LaCoO3 thin films from LDA+U calculations

With local density approximation+Hubbard U (LDA+U ) calculations, we show that the ferromagnetic (FM) insulating state observed in tensile-strained LaCoO3 epitaxial thin films is most likely a mixture of low-spin (LS) and high-spin (HS) Co, namely, a HS/LS mixture state. Compared with other FM states, including the intermediate-spin (IS) state (metallic within LDA+U ), which consists of IS Co o...

Ferromagnetism in pseudocubic BaFeO3 epitaxial films

Growth and properties of epitaxial BaFeO3 thin films in the metastable cubic perovskite phase are examined. BaFeO3 films were grown on 012 LaAlO3 and 001 SrTiO3 single crystal substrates by pulsed-laser deposition. X-ray diffraction shows that films grown between 650 and 850 °C yield an oxygen-deficient BaFeO2.5+x pseudocubic perovskite phase that decreases in lattice spacing with increasing gr...

Ferromagnetism in nanocrystalline epitaxial Co:TiO2 thin films

Dislocation Energetics in Epitaxial Strained Islands

We calculate (to rst order in the Burgers vector) the energy of introducing dislocations into Stranski-Krastanow islands having equilibrium shape. These results suggest that misst dislocations of diierent Burgers vector tend to segregate spatially within the islands, which may aaect the mosaic structure of lms formed by island coalescence.