Investigations on magnetostatic interactions among CoFeB layers with perpendicular anisotropy in [Ta/CoFeB/MgO]N multilayers
The magnetostatic interactions among CoFeB layers with perpendicular anisotropy are studied in [Ta/CoFeB/MgO]N multilayers by measured loops, magnetic domains, and a simple model. With increasing repeat number N or decreasing separation thickness d between adjacent CoFeB layers, higher magnetostatic...
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Veröffentlicht in: | Journal of applied physics 2014-05, Vol.115 (17) |
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Hauptverfasser: | , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The magnetostatic interactions among CoFeB layers with perpendicular anisotropy are studied in [Ta/CoFeB/MgO]N multilayers by measured loops, magnetic domains, and a simple model. With increasing repeat number N or decreasing separation thickness d between adjacent CoFeB layers, higher magnetostatic interaction among CoFeB layers results in bow-tie shape perpendicular loops and shrinking of domain size at remanence state. The measured nucleation field Hn of bow-tie shape perpendicular loops can be explained by a simple theoretical model including the intralayer and interlayer magnetostatic interactions among CoFeB layers with a certain domain size. |
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ISSN: | 0021-8979 1089-7550 |
DOI: | 10.1063/1.4868924 |