Search Results - "POPPA, H"

Layer resolved structural relaxation at the surface of magnetic FePt icosahedral nanoparticles by Wang, R M, Dmitrieva, O, Farle, M, Dumpich, G, Ye, H Q, Poppa, H, Kilaas, R, Kisielowski, C

“…The periodic shell structure and surface reconstruction of metallic FePt nanoparticles with icosahedral structure has been quantitatively studied by…”
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Spiral-like continuous spin-reorientation transition of Fe/Ni bilayers on Cu(100) by RAMCHAL, R, SCHMID, A. K, FARLE, M, POPPA, H

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Spin polarized low energy electron microscopy investigations of magnetic transitions in Fe/Cu(1 0 0) by Man, K.L, Altman, M.S, Poppa, H

“…Magnetic transitions in ultrathin Fe films on the Cu(1 0 0) surface have been studied with spin polarized low energy electron microscopy. By monitoring…”
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Variable temperature and ex situ spin-polarized low-energy electron microscope by Tober, E. D., Witte, G., Poppa, H.

“…The spin-polarized low-energy electron microscope (SPLEEM) at NCEM has been utilized to examine the magnetic domain formation in thin films of Co grown on…”
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Oxidation of carbon monoxide on palladium: role of the alumina support by Rumpf, F., Poppa, H., Boudart, M.

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A new surface microscope for magnetic imaging by Grzelakowski, K., Duden, T., Bauer, E., Poppa, H., Chiang, S.

“…The design concepts and operation of a new type of electron microscope which allows the imaging of magnetic surface structures with high vertical and moderate…”
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Quantum well resonances in ferromagnetic Co films by Scheunemann, T., Feder, R., Henk, J., Bauer, E., Duden, T., Pinkvos, H., Poppa, H., Wurm, K.

“…The above-vacuum-threshold electronic structure of ultrathin Co films on W(110) is studied for coverages from 1 monoatomic layer (ML) upward. For n ML, the…”
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LEEM studies of the microstructure and magnetic domain structure of ultrathin films by Bauer, E., Duden, T., Pinkvos, H., Poppa, H., Wurm, K.

“…LEEM, SPLEEM and other studies of Co and Cu on W(110) are reviewed. Single, double and sandwich layers are used to illustrate the interrelation between growth,…”
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Three-dimensional transmission electron microscopy observations of supported palladium particles by Fuchs, G, Neiman, D, Poppa, H

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High resolution, high speed ultrahigh vacuum microscopy by Poppa, Helmut

“…The history and future of transmission electron microscopy (TEM) is discussed as it refers to the eventual development of instruments and techniques applicable…”
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Effect of substrate preparation on the structure and chemisorption properties of Pd/MgO model catalyst by Henry, C. R., Poppa, H.

“…Pd/MgO model catalysts are prepared by vapor deposition of Pd particles on MgO thin films which are deposited, at different temperatures, on UHV cleaved mica…”
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The determination of structure in small supported metal particles by scanning transmission electron diffraction by Poppa, H., Moorhead, R. D., Avalos‐Borja, M.

“…The crystallographic structure of small Pd particles formed during the earliest stages of vapor deposition onto refractory oxide supports was studied by energy…”
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An ultrahigh vacuum multipurpose specimen chamber with sample introduction system for in situ transmission electron microscopy investigations by Heinemann, K., Poppa, H.

“…A commercial transmission electron microscope (TEM), with flat-plate upper pole piece configuration of the objective lens, and top-entry specimen introduction…”
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Structure and morphology characterization of nanometer-size metal aggregates by electron scattering patterns by Gallezot, P, Avalos-Borja, M, Poppa, H, Heinemann, K

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Auger and electron energy loss spectroscopies of small palladium particles supported on (111) oriented MgO films by Henry, C. R., Poppa, H.

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Micro-area Auger analysis of a SiC/Ti fibre composite by ZIRONI, E.P, POPPA, H

“…Micro-area Auger electron spectroscopy with a spatial resolution of less than 50 nm has been used to study the concentration of elements across the reaction…”
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In situ investigation of the mobility of small gold clusters on cleaved MgO surfaces by METOIS, J J, Heinemann, K, POPPA, H

“…The mobility of small clusters of gold (about 10 A in diameter) on electron-beam-cleaved MgO surfaces was studied by in situ transmission electron microscopy…”
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Decomposition of ethylene on small Pd particles by Durrer, W. G., Poppa, H., Dickinson, J. T., Park, C.

“…New results have been obtained which contribute to the understanding of hydrocarbon reactions on the surface of highly dispersed metal systems. Small particle…”
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Growth and properties of particulate Fe films vapor deposited in UHV on planar alumina substrates by Poppa, H., Papageorgopoulos, C. A., Marks, F., Bauer, E.

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Interfacial layers in high-temperature-oxidized NiCrAl by Larson, L. A., Browning, R., Poppa, H., Smialek, J.

“…The utility of Auger electron spectroscopy combined with ball cratering for depth analysis of oxide and diffusion layers produced in a Ni-14Cr-24Al alloy by…”
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