The effect of inserted layers on the anomalous Hall effect and perpendicular magnetic anisotropy in Ta/CoFeB/MgO heterostructures
In this work, Ta/M/CoFeB/MgO/Ta multilayers were designed to investigate the effect of M insertion on the anomalous Hall effect (AHE) and perpendicular magnetic anisotropy (PMA). Once inserted, Bi did not remain at the interface of Ta and CoFeB; it migrated to the surface of the films, which was not...
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Veröffentlicht in: | AIP advances 2018-07, Vol.8 (7), p.075103-075103-6 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In this work, Ta/M/CoFeB/MgO/Ta multilayers were designed to investigate the effect of M insertion on the anomalous Hall effect (AHE) and perpendicular magnetic anisotropy (PMA). Once inserted, Bi did not remain at the interface of Ta and CoFeB; it migrated to the surface of the films, which was not beneficial to PMA. X-ray photoelectron spectroscopic analyses revealed that the segregation of Ta was partly suppressed by the insertion of an Mo, Hf or Pt layer. However, the formation of a CoPt (or FePt) alloy decreased the PMA in the case of a Pt layer. The sample with Hf and Mo still exhibited a clear PMA after annealing at a 350 and 500 °C, respectively. |
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ISSN: | 2158-3226 2158-3226 |
DOI: | 10.1063/1.5019988 |