| Autor: |
Alexander G Kolesnikov, Maxim E Stebliy, Alexey V Ognev, Alexander S Samardak, Aleksandr N Fedorets, Vladimir S Plotnikov, Xiufeng Han, Ludmila A Chebotkevich |
| Předmět: |
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| Zdroj: |
Journal of Physics D: Applied Physics; 26/10/2016, Vol. 49 Issue 42, p1-1, 1p |
| Abstrakt: |
We present results on a study of the interplay between microstructure and the magnetic properties of ultrathin Ru/Co/Ru films with perpendicular magnetic anisotropy (PMA). To induce PMA in the Co layer, we experimentally determined thicknesses of the buffer and capping layers of Ru. The maximum value of PMA was observed for the Co thickness of 0.9 nm with the 3 nm thick capping layer. The effective anisotropy field (Heff) and coercive force (Hc) of the Co layer are very sensitive to the Ru buffer layer thickness (tb). The values of Heff and Hc increase approximately by two and ten times, correspondingly, when tb changes from 6 to 20 nm, owing to an increase in volume fraction of the crystalline phase as a result of the grains’ growth. PMA is found to be mainly enhanced by elastic strains induced by the lattice mismatch on the Ru/Co and Co/Ru interfaces, leading to the deformation of the Co lattice. The surface impact is determined to be less than 10% of the magneto-elastic contribution to the effective anisotropy. Observation of the magnetic domain structure by means of polar Kerr microscopy reveals that out-of-plane magnetization reversal occurs through the nucleation, growth, and annihilation of domains, where the average size drastically rises with the increasing tb. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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