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The wavelengths and energies of thermal and cold neutrons are ideally matched to the length and energy scales in the materials that underpin technologies of the present and future: ranging from semiconductors to magnetic devices, composites to biomaterials and polymers. The Spallation Neutron Source (SNS) will use an accelerator to produce the most intense(More)
We have shown that polarized neutron reflectometry can determine in a model-free way not only the mean magnetization of a ferromagnetic thin film at any point of a hysteresis cycle, but also the mean square dispersion of the magnetization vectors of its lateral domains. This technique is applied to elucidate the mechanism of the magnetization reversal of an(More)
The oxidation states and reducibility of γ-alumina-supported vanadium oxide catalysts with V loadings between 1.7 and 15.7 wt% were studied by means of temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) for fresh as well as used catalysts. As additional experimental techniques, X-ray diffraction (XRD), diffuse reflectance(More)
The stability of different vanadium-based catalysts for the selective oxidation of small hydrocarbons under the ultra-high vacuum (UHV) conditions of standard X-ray photoelectron spectroscopy (XPS) was studied by using a multipurpose surface analysis apparatus which allows time spans of only a few minutes between the sample transfer into vacuum and the(More)
Due to hydrogen possessing a relatively large neutron scattering length, hydrogen absorption and desorption behaviors in metal thin films can straightforwardly be investigated by neutron reflectometry. However, to further elucidate the chemical structure of the hydrogen absorbing materials, complementary techniques such as high resolution X-ray(More)
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