Role of boundary conditions and dimensions on the micromagnetics of a cobalt point contact
Autor: | K. P. Wellock, R. P. van Gorkom, J. Caro, S. J. C. H. Theeuwen, N. N. Gribov, S. Radelaar |
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Rok vydání: | 1999 |
Předmět: | |
Zdroj: | Journal of Applied Physics. 85:6196-6198 |
ISSN: | 1089-7550 0021-8979 |
DOI: | 10.1063/1.370219 |
Popis: | We have calculated the micromagnetic structure of a Co point contact, for applied magnetic fields parallel (H∥) and perpendicular (H⊥) to the device’s electrodes. Different boundary conditions and dimensions have been examined. In most situations a Neel wall is formed in the constriction. When the size of the device is reduced (or the exchange stiffness is increased), then the energy barrier between the state with and without the Neel wall is increased. The domain wall magnetoresistance (DWMR) and anisotropic MR (AMR) have been estimated, and they show a maximum in the DWMR for both field directions of the applied magnetic field and a maximum and minimum in the AMR for H∥ and H⊥, respectively. |
Databáze: | OpenAIRE |
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