Zobrazeno 1 - 10
of 275
pro vyhledávání: '"Ohldag H"'
Autor:
Pile, S., Buchner, M., Ney, V., Schaffers, T., Lenz, K., Narkowicz, R., Lindner, J., Ohldag, H., Ney, A.
Publikováno v:
Phys. Rev. Applied 14, 034005 (2020)
Spin pumping in a ferromagnet/nonferromagnet heterostructure is directly imaged with spatial resolution as well as element selectivity. The time-resolved detection in scanning transmission x-ray microscopy allows to directly probe the spatial extent
Externí odkaz:
http://arxiv.org/abs/2005.08728
Autor:
Schaffers, T., Feggeler, T., Pile, S., Meckenstock, R., Buchner, M., Spoddig, D., Ney, V., Farle, M., Wende, H., Wintz, S., Weigand, M., Ohldag, H., Ollefs, K., Ney, A.
Publikováno v:
Nanomaterials 9, 940 (2019)
Using a time-resolved detection scheme in scanning transmission X-ray microscopy (STXM) we measured element resolved ferromagnetic resonance (FMR) at microwave frequencies up to 10\,GHz and a spatial resolution down to 20\,nm at two different synchro
Externí odkaz:
http://arxiv.org/abs/1905.12497
Autor:
Iacocca, E., Liu, T-M., Reid, A. H., Fu, Z., Ruta, S., Granitzka, P. W., Jal, E., Bonetti, S., Gray, A. X., Graves, C. E., Kukreja, R., Chen, Z., Higley, D. J., Chase, T., Guyader, L. Le, Hirsch, K., Ohldag, H., Schlotter, W. F., Dakovski, G. L., Coslovich, G., Hoffmann, M. C., Carron, S., Tsukamoto, A., Savoini, M., Kirilyuk, A., Kimel, A. V., Rasing, Th., Stöhr, J., Evans, R. F. L., Ostler, T., Chantrell, R. W., Hoefer, M. A., Silva, T. J., Dürr, H. A.
Publikováno v:
Nature Communications 10, 1756 (2019)
Sub-picosecond magnetisation manipulation via femtosecond optical pumping has attracted wide attention ever since its original discovery in 1996. However, the spatial evolution of the magnetisation is not yet well understood, in part due to the diffi
Externí odkaz:
http://arxiv.org/abs/1809.02076
Autor:
Övergaard, T., Wojek, B. M, Leandersson, M., Ohldag, H., Bonetti, S., Wiell, T., Tjernberg, O.
Free-standing ferromagnetic nano-membranes with thicknesses below 10 nm could effectively be used for spin selective filtering of electrons. Such membranes can work both as spin detectors in electron-spectroscopy, -microscopy and -diffraction as well
Externí odkaz:
http://arxiv.org/abs/1709.03838
Autor:
Ilchen, M., Hartmann, G., Rupprecht, P., Artemyev, A. N., Coffee, R. N., Li, Z., Ohldag, H., Ogasawara, H., Osipov, T., Ray, D., Schmidt, Ph., Wolf, T. J. A., Ehresmann, A., Moeller, S., Knie, A., Demekhin, Ph. V.
Publikováno v:
Phys. Rev. A 95, 053423 (2017)
The angle-resolved inner-shell photoionization of R-trifluoromethyloxirane, C3H3F3O, is studied experimentally and theoretically. Thereby, we investigate the photoelectron circular dichroism (PECD) for nearly-symmetric O 1s and F 1s electronic orbita
Externí odkaz:
http://arxiv.org/abs/1704.02265
Autor:
Reid, A. H., Shen, X., Maldonado, P., Chase, T., Jal, E., Granitzka, P., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stöhr, J., Oppeneer, P. M., Wang, X. J., Dürr, H. A.
We use ultrafast x-ray and electron diffraction to disentangle spin-lattice coupling of granular FePt in the time domain. The reduced dimensionality of single-crystalline FePt nanoparticles leads to strong coupling of magnetic order and a highly anis
Externí odkaz:
http://arxiv.org/abs/1602.04519
Autor:
Gray, A. X., Hoffmann, M. C., Jeong, J., Aetukuri, N. P., Zhu, D., Hwang, H. Y., Brandt, N. C., Wen, H., Sternbach, A. J., Bonetti, S., Reid, A. H., Kukreja, R., Graves, C., Wang, T., Granitzka, P., Chen, Z., Higley, D. J., Chase, T., Jal, E., Abreu, E., Liu, M. K., Weng, T. -C., Sokaras, D., Nordlund, D., Chollet, M., Lemke, H., Glownia, J., Trigo, M., Zhu, Y., Ohldag, H., Freeland, J. W., Samant, M. G., Berakdar, J., Averitt, R. D., Nelson, K. A., Parkin, S. S. P., Dürr, H. A.
Publikováno v:
Phys. Rev. B 98, 045104 (2018)
Vanadium dioxide, an archetypal correlated-electron material, undergoes an insulator-metal transition near room temperature that exhibits electron-correlation-driven and structurally-driven physics. Using ultrafast optical spectroscopy and x-ray scat
Externí odkaz:
http://arxiv.org/abs/1601.07490
Autor:
Higgs, T. D. C., Bonetti, S., Ohldag, H., Banerjee, N., Wang, X. L., Rosenberg, A., Cai, Z., Zhao, J. H., Moler, K. A., Robinson, J. W. A.
Publikováno v:
Scientific Reports 6, Article number: 30092 (2016)
Thin film magnetic heterostructures with competing interfacial coupling and Zeeman energy pro- vide a fertile ground to study phase transition between different equilibrium states as a function of external magnetic field and temperature. A rare-earth
Externí odkaz:
http://arxiv.org/abs/1505.05864
Autor:
Lorite, I., Zandalazini, C., Esquinazi, P., Spemann, D., Friedländer, S., Pöppl, A., Michalsky, T., Grundmann, M., Vogt, J., Meijer, J., Heluani, S. P., Ohldag, H., Adeagbo, W. A., Nayak, S. K., Hergert, W., Ernst, A., Hoffmann, M.
The magneto-transport properties of single proton-implanted ZnO and of Li(7\%)-doped ZnO microwires have been studied. The as-grown microwires were highly insulating and not magnetic. After proton implantation the Li(7\%) doped ZnO microwires showed
Externí odkaz:
http://arxiv.org/abs/1504.08230
Publikováno v:
Phys. Rev. Lett. 115, 127205 (2015)
We report the direct observation of large amplitude spin-excitations localized in a spin-transfer nanocontact using scanning transmission x-ray microscopy. Experiments were conducted using a nanocontact to an ultrathin ferromagnetic multilayer with p
Externí odkaz:
http://arxiv.org/abs/1504.00488