Zobrazeno 1 - 10
of 216
pro vyhledávání: '"Ollefs, K."'
Autor:
Giron, S., Polin, N., Adabifiroozjaei, E., Yang, Y., Kovács, A., Almeida, T. P., Ohmer, D., Üstüner, K., Saxena, A., Katter, M., Radulov, I. A., Freysoldt, C., Dunin-Borkowski, R. E., Farle, M., Durst, K., Zhang, H., Alff, L., Ollefs, K., Xu, B. -X., Gutfleisch, O., Molina-Luna, L., Gault, B., Skokov, K. P.
Permanent magnets draw their properties from a complex interplay, across multiple length scales, of the composition and distribution of their constituting phases, that act as building blocks, each with their associated intrinsic properties. Gaining a
Externí odkaz:
http://arxiv.org/abs/2304.14958
Autor:
Skokov, K. P., Karpenkov, A. Y., Karpenkov, D. Y., Radulov, I. A., Günzing, D., Eggert, B., Rogalev, A., Wilhelm, F., Liu, J., Shao, Y., Ollefs, K., Gruner, M. E., Wende, H., Gutfleisch, O.
Alloys with a first-order magnetic transition are central to solid-state refrigeration technology, sensors and actuators, or spintronic devices. The discontinuous nature of the transition in these materials is a consequence of the coupling between th
Externí odkaz:
http://arxiv.org/abs/2303.13836
Autor:
Rothenbach, N., Gruner, M. E., Ollefs, K., Schmitz-Antoniak, C., Salamon, S., Zhou, P., Li, R., Mo, M., Park, S., Shen, X., Weathersby, S., Yang, J., Wang, X. J., Šipr, O., Ebert, H., Sokolowski-Tinten, K., Pentcheva, R., Bovensiepen, U., Eschenlohr, A., Wende, H.
Publikováno v:
Phys. Rev. B 104, 144302 (2021)
Time-dependent and constituent-specific spectral changes in soft near edge X-ray spectroscopy (XAS) of an [Fe/MgO]$_8$ metal/insulator heterostructure upon laser excitation are analyzed at the O K-edge with picosecond time resolution. The oxygen abso
Externí odkaz:
http://arxiv.org/abs/1911.06201
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:
Rothenbach, N., Gruner, M. E., Ollefs, K., Schmitz-Antoniak, C., Salamon, S., Zhou, P., Li, R., Mo, M., Park, S., Shen, X., Weathersby, S., Yang, J., Wang, X. J., Pentcheva, R., Wende, H., Bovensiepen, U., Sokolowski-Tinten, K., Eschenlohr, A.
Publikováno v:
Phys. Rev. B 100, 174301 (2019)
The element specificity of soft X-ray spectroscopy makes it an ideal tool for analyzing the microscopic origin of ultrafast dynamics induced by localized optical excitation in metal-insulator heterostructures. Using [Fe/MgO]$_n$ as a model system, we
Externí odkaz:
http://arxiv.org/abs/1902.05264
Akademický článek
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Autor:
Schäfer, N., Günzing, D., Jiang, T., Karabas, N., Arzumanov, A., Motta-Meira, D., Ollefs, K., Komissinskiy, P., Major, M., Arnold, M., Pietralla, N., Wende, H., Molina-Luna, L., Lützenkirchen-Hecht, D., Alff, L.
Publikováno v:
Journal of Applied Physics; 7/28/2023, Vol. 134 Issue 4, p1-7, 7p
Autor:
Valvidares, M., Dix, N., Isasa, M., Ollefs, K., Wilhelm, F., Rogalev, A., Sánchez, F., Pellegrin, E., Bedoya-Pinto, A., Gargiani, P., Hueso, L. E., Casanova, F., Fontcuberta, J.
Publikováno v:
Physical Review B 93, 214415 (2016)
Ultra-thin Pt films grown on insulating ferrimagnetic CoFe2O4 (111) epitaxial films display a magnetoresistance upon rotating the magnetization of the magnetic layer. We report here X-ray magnetic circular dichroism (XMCD) recorded at Pt-L2,3 and Pt-
Externí odkaz:
http://arxiv.org/abs/1510.01080
Autor:
Caminale, M., Ghosh, A., Auffret, S., Ebels, U., Ollefs, K., Wilhelm, F., Rogalev, A., Bailey, W. E.
Publikováno v:
Phys. Rev. B 94 014414 (2016)
We investigated the spin pumping damping contributed by paramagnetic layers (Pd, Pt) in both direct and indirect contact with ferromagnetic Ni$_{81}$Fe$_{19}$ films. We find a nearly linear dependence of the interface-related Gilbert damping enhancem
Externí odkaz:
http://arxiv.org/abs/1308.0450
Akademický článek
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