High-resolution transmission electron microscopy observations and magnetic ac susceptibility measurements have been carried out to study the changes in the magnetic properties of La1−xSrxCoO3 samples (x 0.3) processed at different annealing temperatures, ranging from 1273 to 1573 K. Although neutron diffraction excludes the coexistence of distinct phases with different chemical composition, roo...

Understanding the nature of charge carriers at the LaAlO3/SrTiO3 interface is one of the major open issues in the full comprehension of the charge confinement phenomenon in oxide heterostructures. Here, we investigate thermopower to study the electronic structure in LaAlO3/SrTiO3 at low temperature as a function of gate field. In particular, under large negative gate voltage, corresponding to t...

Possible ferromagnetism induced in otherwise nonmagnetic materials has been motivating intense research in complex oxide heterostructures. Here we show that a confined magnetism is realized at the interface between SrTiO3 and two insulating polar oxides, BiMnO3 and LaAlO3. By using polarization dependent x-ray absorption spectroscopy, we find that in both cases the magnetism can be stabilized b...

Introduction poly(l-lactic acid) (PLLA) has been approved for clinical use by the US Food and Drug Administration (FDA); however, their stronger hydrophobicity and relatively fast degradation rate restricted their widespread application. In consideration of the composition of bone, the inorganic-organic composite has a great application prospect in bone tissue engineering. Many inorganic-organi...

Nanophotonic devices seek to generate, guide, and/or detect light using structures whose nanoscale dimensions are closely tied to their functionality.1,2 Semiconducting nanowires, grown with tailored optoelectronic properties, have been successfully placed into devices for a variety of applications.3–5 However, the integration of photonic nanostructures with electronic circuitry has always been...

Polar tweed was discovered in mechanically stressed LaAlO3. Local patches of strained material (diameter ca. 5 μm) form interwoven patterns seen in birefringence images, Piezo-Force Microscopy (PFM) and Resonant Piezoelectric Spectroscopy (RPS). PFM and RPS observations prove unequivocally that electrical polarity exists inside the tweed patterns of LaAlO3. The local piezoelectric effect varies...

Articles you may be interested in Transport critical current measurements on a Cu-substituted BaFe2As2 superconductor Increased grain boundary critical current density J c gb by Pr-doping in pulsed laser–deposited Y1−x Pr x BCO thin films Direct observation of nanometer-scale amorphous layers and oxide crystallites at grain boundaries in polycrystalline Sr 1 − x K x Fe 2 As 2 superconductors Ap...

The temperature dependent infrared conductivities of Bi,Sr,CaCu,O, (T, N 82 K) and BiZSrZCuO, (T, 6 5 K) are compared with non-Fermi liquid approaches to the normal state of the high T, superconductors. We find reasonable agreement with our data only for o 5 0.12 eV. We attribute the remaining spectral weight to a low-energy excitation in copper-oxide superconductors doped well above the metal-...

The interplay between doping and antiferromagnetism is a central issue in theories of the oxide superconductors. Undoped La2Cu04 is known to be an antiferromagnetic insulator, and may be modeled by Cu02 planes with a spin2 local moment on each Cu. Sr doping introduces holes into the oxygen p orbitals. Following Anderson's suggestion, ' there has been considerable interest in the "t-J"model of a...

We investigated the effects of different annealing ambients on the physical and electrical properties of LaAlO3 films grown by atomic layer deposition. Post-grown rapid thermal annealing (RTA) was carried out at 600 °C for 1 min in vacuum, N2, and O2, respectively. It was found that the chemical bonding states at the interfacial layers (ILs) between LaAlO3 films and Si substrate were affected b...