Synthesis of Perovskite Oxide Nanocubes

Magnetic field-induced self-assembly of iron oxide nanocubes.

Self-assembly of inorganic nanoparticles has been studied extensively for particles having different sizes and compositions. However, relatively little attention has been devoted to how the shape and surface chemistry of magnetic nanoparticles affects their self-assembly properties. Here, we undertook a combined experiment-theory study aimed at better understanding of the self-assembly of cubic...

Influence of perovskite termination on oxide heteroepitaxy

We report a combined high-temperature scanning tunneling microscopy, ion scattering spectroscopy, and photoelectron spectroscopy study of bare lanthanum aluminate LaAlO3 LAO and of the initial stages of anatase TiO2 growth on LAO 001 . LAO 001 exhibits mixed La–O and Al–O2 surface terminations at 400 °C. Heteroepitaxial TiO2, grown by evaporating Ti metal in O2, nucleates near step edges, growi...

Synthesis of Nano-Structured La0.6Sr0.4Co0.2Fe0.8O3 Perovskite by Co-Precipitation Method

Nano-structured lanthanum strontium cobalt ferrite, La0.6Sr0.4Co0.2Fe0.8O3 (LSCF), was successfully synthesized via co-precipitation method using metal nitrates as starting materials. Effects of precipitating agent and calcination temperature on the phase composition and morphology of synthesized powders were systematically studied using X-ray diffraction (XRD) and field emission scanning elect...

Magnetoresistance of metallic perovskite oxide LaNiO3−δ

We report a study of the magnetoresistance (MR) of the metallic perovskite oxide LaNiO3−δ as a function of the oxygen stoichiometry δ (δ ≤ 0.14), magnetic field ( H ≤ 6T ) and temperature (1.5K ≤ T ≤ 25K). We find a strong dependence of the nature of MR on the oxygen stoichiometry. The MR at low temperatures change from positive to negative as the sample becomes more oxygen deficient ( i.e, δ i...

The Anisotropic Growth of Perovskite Oxide Nanowires