Titanium dioxide-based nanofibers (TiO2 nanofiber) were prepared by an electrospinning technique. The electrospun composite fibers were synthesized at different concentrations of titanium isopropoxide (25.35, 50.69, 76.05 wt%) and calcinated at different temperatures (450 oC, 650 oC and 850 oC) for 2 h. The diameters of nanofibers decreased by increas...

By utilizing the spin-dependent mean free paths in Co, a polarizer-analyzer system for hot electrons has been established, enabling ballistic electron emission microscopy to measure the effects of scattering on the spin-dependent transport of hot electrons. Through the gradual oxidation of Al, it is possible to controllably increase the scattering effects of a Cu–Al–Cu spacer layer. As scatteri...

Anisotropic spin-orbit scattering of hot-electron spins in ferromagnets is examined by injecting a hot-electron current into the thin ferromagnetic base of a transistor and measuring the current attenuation as a function of the magnetization orientation. The transmission anisotropy is described by a simple model, from which we extract an effective spin-orbit scattering length of 420 nm for hot-...

Quantum transport in disordered systems has been studied for many years, yet many open problems remain. One focus of these investigations is the interference of inelastic electron scattering due to electron-phonon interaction and elastic electron scattering due to impurities, boundaries and defects. Electron-phonon interaction determines the electron energy loss rate and also manifests itself i...

Ion beam analysis is the method of choice for studying the composition of layers with a thickness exceeding several tens of Å. Recently it has become clear that elastic scattering of keV electrons can be used to determine the surface composition of relatively thick layers (up to 1000 Å) in a way very similar to ion scattering experiments. These electron-scattering experiments share much of the ...

The distribution of the electron scattering rate on the Fermi surface of a quasi-one-dimensional conductor is calculated for the electron-electron umklapp interaction. We nd that in certain regions on the Fermi surface the scattering rate is anomalously high. The reason for the existence of these \hot spots" is analogous to the appearance of the van Hove singularities in the density of states. ...