Search Results - "Pescia, D"

Vectorial, non-destructive magnetic imaging with scanning tunneling microscopy in the field emission regime by Ramsperger, U., Pescia, D.

“…When a scanning tunneling microscope is operated at tip-target distances ranging from few nanometers to few tens of nanometers (Fowler-Nordheim or field…”
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Critical exponents and scaling invariance in the absence of a critical point by Saratz, N., Zanin, D. A., Ramsperger, U., Cannas, S. A., Pescia, D., Vindigni, A.

“…The paramagnetic-to-ferromagnetic phase transition is classified as a critical phenomenon due to the power-law behaviour shown by thermodynamic observables…”
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Hallmark of quantum skipping in energy filtered lensless scanning electron microscopy by Thamm, A.-K., Wei, J., Zhou, J., Walker, C. G. H., Cabrera, H., Demydenko, M., Pescia, D., Ramsperger, U., Suri, A., Pratt, A., Tear, S. P., El-Gomati, M. M.

“…We simulate the electronic system of ejected electrons arising when a tip, positioned few 10 nm away from a surface, is operated in the field emission regime…”
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An inverse transition of magnetic domain patterns in ultrathin films by Portmann, O, Vaterlaus, A, Pescia, D

“…Inverse freezing and inverse melting are processes where a more symmetric phase is found at lower temperatures than at higher temperatures. Such inverse…”
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Experimental phase diagram of perpendicularly magnetized ultrathin ferromagnetic films by Saratz, N, Lichtenberger, A, Portmann, O, Ramsperger, U, Vindigni, A, Pescia, D

“…We image the domain patterns in perpendicularly magnetized ultrathin Fe films on Cu(100) as a function of the temperature T and the applied magnetic field H…”
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Spin-polarised electrons in a one-magnet-only Mott spin junction by De Pietro, L., Bertolini, G., Peter, Q., Cabrera, H., Vindigni, A., Gürlü, O., Pescia, D., Ramsperger, U.

“…The current flowing through a Mott spin junction depends on the relative spin orientation of the two ferromagnetic layers comprising the “source” and “drain”…”
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Correction: Corrigendum: Critical exponents and scaling invariance in the absence of a critical point by Saratz, N., Zanin, D. A., Ramsperger, U., Cannas, S. A., Pescia, D., Vindigni, A.

“…Nature Communications 7: Article number: 13611 (2016); Published 5 December 2016; Updated 17 January 2017 The original version of this Article contained a…”
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Corrigendum: Critical exponents and scaling invariance in the absence of a critical point by Saratz, N, Zanin, D A, Ramsperger, U, Cannas, S A, Pescia, D, Vindigni, A

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Scale invariance of a diodelike tunnel junction by Cabrera, H., Zanin, D. A., De Pietro, L. G., Michaels, Th, Thalmann, P., Ramsperger, U., Vindigni, A., Pescia, D., Kyritsakis, A., Xanthakis, J. P., Li, Fuxiang, Abanov, Ar

“…We measure the current vs voltage (I-V) characteristics of a diodelike tunnel junction consisting of a sharp metallic tip placed at a variable distance d from…”
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Self focusing of field emitted electrons at an ellipsoidal tip by Kyritsakis, A., Kokkorakis, G. C., Xanthakis, J. P., Kirk, T. L., Pescia, D.

“…In models of field emission the needle is usually terminated by a hemispherical cap. Here we choose to terminate it with a hemiellipsoidal cap and use a…”
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Fourier transform imaging of spin vortex eigenmodes by BUESS, M, HÖLLINGER, R, HAUG, T, PERZLMAIER, K, KREY, U, PESCIA, D, SCHEINFEIN, M. R, WEISS, D, BACK, C. H

“…Thin-circular lithographically defined magnetic elements with a spin vortex configuration are excited with a short perpendicular magnetic field pulse. We…”
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Non-topographic current contrast in scanning field emission microscopy by Bertolini, G., Gürlü, O., Pröbsting, R., Westholm, D., Wei, J., Ramsperger, U., Zanin, D. A., Cabrera, H., Pescia, D., Xanthakis, J. P., Schnedler, M., Dunin-Borkowski, R. E.

“…In scanning field emission microscopy (SFEM), a tip (the source) is approached to few (or a few tens of) nanometres distance from a surface (the collector) and…”
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Ultrafast reduction of the total magnetization in iron by Fognini, A., Michlmayr, T. U., Salvatella, G., Wetli, C., Ramsperger, U., Bähler, T., Sorgenfrei, F., Beye, M., Eschenlohr, A., Pontius, N., Stamm, C., Hieke, F., Dell'Angela, M., Jong, S. de, Kukreja, R., Gerasimova, N., Rybnikov, V., Al-Shemmary, A., Redlin, H., Raabe, J., Föhlisch, A., Dürr, H. A., Wurth, W., Pescia, D., Vaterlaus, A., Acremann, Y.

“…Surprisingly, if a ferromagnet is exposed to an ultrafast laser pulse, its apparent magnetization is reduced within less than a picosecond. Up to now, the…”
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Thirty per cent contrast in secondary-electron imaging by scanning field-emission microscopy by Zanin, D. A., De Pietro, L. G., Peter, Q., Kostanyan, A., Cabrera, H., Vindigni, A., Bähler, Th, Pescia, D., Ramsperger, U.

“…We perform scanning tunnelling microscopy (STM) in a regime where primary electrons are field-emitted from the tip and excite secondary electrons out of the…”
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Imaging Precessional Motion of the Magnetization Vector by Acremann, Y., Back, C. H., Buess, M., Portmann, O., Vaterlaus, A., Pescia, D., Melchior, H.

“…We report on imaging of three-dimensional precessional orbits of the magnetization vector in a magnetic field by means of a time-resolved vectorial Kerr…”
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Observation of stripe mobility in a dipolar frustrated ferromagnet by Portmann, O, Vaterlaus, A, Pescia, D

“…We have discovered two novel aspects of the stripe-domain to paramagnetic transition in perpendicularly magnetized Fe films on Cu(100). First, the width of the…”
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The role of space charge in spin-resolved photoemission experiments by Fognini, A, Salvatella, G, Michlmayr, T U, Wetli, C, Ramsperger, U, Bähler, T, Sorgenfrei, F, Beye, M, Eschenlohr, A, Pontius, N, Stamm, C, Hieke, F, Dell'Angela, M, de Jong, S, Kukreja, R, Gerasimova, N, Rybnikov, V, Redlin, H, Raabe, J, Föhlisch, A, Dürr, H A, Wurth, W, Pescia, D, Vaterlaus, A, Acremann, Y

“…Spin-resolved photoemission is one of the most direct ways of measuring the magnetization of a ferromagnet. If all valence band electrons contribute, the…”
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Scaling theory of electric-field-assisted tunnelling by Michaels, Thomas C. T., Cabrera, H., Zanin, D. A., De Pietro, L., Ramsperger, U., Vindigni, A., Pescia, D.

“…Recent experiments report the current (I) versus voltage (V) characteristics of a tunnel junction consisting of a metallic tip placed at a distance d from a…”
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Evidence of nonplanar field emission via secondary electron detection in near field emission scanning electron microscopy by Kirk, T. L., Scholder, O., De Pietro, L. G., Ramsperger, U., Pescia, D.

“…Nonplanar field emission from electrochemically etched tungsten field emitters has been observed using near field emission scanning electron microscopy…”
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Two-Dimensional Magnetic Particles by Stamm, C., Marty, F., Vaterlaus, A., Weich, V., Egger, S., Maier, U., Ramsperger, U., Fuhrmann, H., Pescia, D.

“…Single two-dimensional (2D) atomically thick magnetic particles of cobalt and iron with variable size and shape were fabricated by combining a mask technique…”
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