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A hybrid structure of a ferromagnetic Co/ Au/ Ni 81 Fe 19 trilayer on p-type silicon is used to probe the excitation of electron-hole pairs in a ferromagnet during inelastic decay of hot electrons and the subsequent spin-dependent transport of the excited holes into the valence band of the p-type Si collector. The hole current is remarkably sensitive to(More)
The observation of the anomalous Hall effect ͑AHE͒ in Co-doped TiO 2 ferromagnetic semiconductor in the anatase phase is reported. An AHE is observed with magnetic hysteresis consistent with remanence and coercivity obtained from magnetometry data. The anatase films also have reasonable mobility ͑ϳ17 cm 2 /V s͒ at room temperature and carrier density of ϳ5(More)
STUDY DESIGN A retrospective examination of preoperative and postoperative radiographs of the sagittal spine of 30 patients with Scheuermann kyphosis. OBJECTIVES To determine significant correlations between kyphosis and lordosis in Scheuermann kyphosis, determine predictability of spontaneous sagittal lordosis correction after thoracic correction and(More)
Spin-polarized tunneling is investigated in magnetic tunnel junctions containing an ultrathin interfacial layer of Co:TiO 2 magnetic semiconductor. The Co:TiO 2 layers (0 to 1 nm thick) are inserted at the SrTiO 3 Co interface in La 0 67 Sr 0 33 MnO 3 SrTiO 3 Co tunnel junctions. For all junctions we find a negative tunnel magnetoresistance, which decreases(More)
We describe the fabrication of multiterminal semiconductor/ferromagnet probes for a new technique to study magnetic nanostructures: spin-filter scanning tunneling microscopy. We describe the principle of the technique, which is based on spin-polarized tunneling and subsequent analysis of the spin polarization using spin-dependent transmission in the probe(More)
In this study we tried to achieve a better understanding of the biodynamic mechanism of balance in the scoliotic spine. Therefore we focused on the pre- and postoperative spine of patients with idiopathic scoliosis with a primary thoracic curve and a secondary lumbar curve. Several studies showed that the lumbar curve spontaneously corrects and improves(More)
PURPOSE Standard thoracotomy for anterior instrumentation and fusion of the thoracic spine in idiopathic scoliosis may have detrimental effects on pulmonary function. In this study we describe a less invasive anterior surgical technique and show the pre- and postoperative pulmonary function with a minimum follow-up of 2 years. METHODS Twenty patients with(More)
A 48-year-old woman without a significant medical history was referred to our department after the neurologist established Pancoast's syndrome and a well-demarcated homogenous mass in the apex of the right hemithorax on MRI study of the brachial plexus. The tumour was invading the thoracic wall, adjacent musculature and the right plexus brachialis and(More)
The assessment of the influence of individual observations on the outcome of the analysis by perturbation has received a lot of attention for situations in which the observations are independent and identically distributed. However, no methods based on minor perturbations for carrying out such assessments are available in the context of multinomial models.(More)
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(More)