Perpendicular magnetic anisotropy and magnetization process in CoFeB/Pd multilayer films
| Autor: | Ngo, Duc-The, Quach, Duy-Truong, Tran, Quang-Hung, Mølhave, Kristian, Phan, The-Long, Kim, Dong-Hyun |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | J. Phys. D: Appl. Phys. 47 445001 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0022-3727/47/44/445001 |
| Popis: | Perpendicular magnetic anisotropy (PMA) and dynamic magnetization reversal process in [CoFeB $t$ nm/Pd 1.0 nm]$_n$ ($t$ = 0.4, 0.6, 0.8, 1.0, and 1.2 nm; $n$ = 2 - 20) multilayer films have been studied by means of magnetic hysteresis and Kerr effect measurements. Strong and controllable PMA with an effective uniaxial anisotropy up to 7.7$\times$ 10$^6$ J.m$^{-3}$ and a saturation magnetization as low as 200 emu/cc are achieved. Surface/interfacial anisotropy of CoFeB/Pd interfaces, the main contribution to the PMA, is separated from the effective uniaxial anisotropy of the films, and appears to increase with the number of the CoFeB/Pd bilayers. Observation of the magnetic domains during a magnetization reversal process using polar magneto-optical Kerr microscopy shows the detailed behavior of nucleation and displacement of the domain walls. Comment: 18 pages, 5 figures, original research article |
| Databáze: | arXiv |
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