Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Klaus-Dieter Usadel"'
Publikováno v:
Journal of Magnetism and Magnetic Materials. 320:31-35
Spectra of absorbed power as probed by ferromagnetic resonance (FMR) are numerically calculated within a macro-spin model for single domain nanoparticles using Landau–Lifshitz–Gilbert dynamics. Randomly distributed anisotropy axis and a distribut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c7cb53b20504a56c86e27995a546042
https://doi.org/10.1016/j.jmmm.2007.05.001
https://doi.org/10.1016/j.jmmm.2007.05.001
Autor:
Klaus-Dieter Usadel, T. K. Kopeć
Publikováno v:
physica status solidi (b). 243:502-511
We consider the short-range interaction disordered quantum Ising model with symmetric binary ±J bond distribution on the Bethe lattice (with coordination number z). The system exhibits quantum phase transition separating the spin glass and disordere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ce1dd6fc286698493a0173d7077bd2a
https://doi.org/10.1002/pssb.200541282
https://doi.org/10.1002/pssb.200541282
Autor:
Klaus-Dieter Usadel, J. Grabis, Björgvin Hjörvarsson, B Bert Koopmans, Rimantas Brucas, Olga Kazakova, Hartmut Zabel, R. Wieser, C Csaba Jozsa, Inna Soroka, Maj Hanson, M. van Kampen
Publikováno v:
Journal of Physics : Condensed Matter, 17(2), L27-L33. Institute of Physics
Spin chains are the most elementary entities in the study of magnetic ordering behavior. The authors describe a route toward the realization of artificial XY spin chains. Using thin-film deposition and e-beam lithog., 300 and 550 nm diam. pillars con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4f1ea8c050b29aeff007df486f564dc
https://doi.org/10.1088/0953-8984/17/2/l04
https://doi.org/10.1088/0953-8984/17/2/l04
Publikováno v:
Journal of Applied Physics. 95:1357-1363
The structure of domains in the interface monolayer of the antiferromagnet in an exchange-bias system is investigated in the framework of the domain state model. These interface domains carrying remanent magnetization provide the bias field and are s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44fec2003a77787233f3efb66721676a
https://doi.org/10.1063/1.1638888
https://doi.org/10.1063/1.1638888
Publikováno v:
Physical Review B. 85
We have measured the element specific $M(H)$ curves for 5$%$, 10$%$, and 15$%$ Co-doped ZnO epitaxial films with high crystalline perfection using x-ray magnetic circular dichroism (XMCD). The XMCD$(H)$ curves do not saturate up to 17 T directly evid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2144b87b213abb8f2488001128817f63
https://doi.org/10.1103/physrevb.85.245202
https://doi.org/10.1103/physrevb.85.245202
Autor:
Klaus-Dieter Usadel, A. Moschel
Publikováno v:
Journal of Magnetism and Magnetic Materials. 136:99-104
We have calculated, with a Green function method, the magnetization profiles of ferromagnetic multilayers consisting of two different ferromagnetic materials with antiferromagnetic couplings between the films. For strong coupling constants between th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::75a10b547013ed5f09a7bf81c2c81a36
https://doi.org/10.1016/0304-8853(94)90453-7
https://doi.org/10.1016/0304-8853(94)90453-7
Autor:
Klaus-Dieter Usadel, A. Moschel
Publikováno v:
Physical Review B. 49:12868-12871
In this paper we investigate the influence of a surface anisotropy and the dipole interaction on the magnetization of thin films. The surface anisotropy favors a perpendicular orientation while the dipole interaction favors an in-plane magnetization.
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96c47e691c34eac1a81d1bca3a5ccfc5
https://doi.org/10.1103/physrevb.49.12868
https://doi.org/10.1103/physrevb.49.12868
Autor:
Klaus-Dieter Usadel, S. Lubeck
Publikováno v:
Fractals. :1030-1036
We have studied one-dimensional cellular automata with updating rules depending stochastically on the difference of the heights of neighboring cells. The probability for toppling depends on a parameter λ which goes to one with increasing slope, i.e.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1ec69ef803064ac59db22b0afe84e4b
https://doi.org/10.1142/s0218348x9300112x
https://doi.org/10.1142/s0218348x9300112x
Autor:
Klaus-Dieter Usadel, Robert Stamps
Publikováno v:
Physical Review B. 82
The effect of interface magnetic dilution on exchange bias is studied with extensive Monte Carlo simulations for a model system consisting of a ferromagnetic layer exchange coupled to a diluted antiferromagnet. The dependence of the exchange bias fie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ee5a9f0d5b75d72f69d84cd33972b3a
https://doi.org/10.1103/physrevb.82.094432
https://doi.org/10.1103/physrevb.82.094432