Interfacial charge accumulation effect on magnetic domain wall nucleation and propagation in a Pt/Co/Pt/Al2O3 structure

Weiwei Lin; Nicolas Vernier; Guillaume Agnus; Na Lei; Sylvain Eimer; Dafiné Ravelosona

Interfacial charge accumulation effect on magnetic domain wall nucleation and propagation in a Pt/Co/Pt/Al2O3 structure

Materials Science 2019-09-25 v2 Mesoscale and Nanoscale Physics Applied Physics

Authors: Weiwei Lin , Nicolas Vernier , Guillaume Agnus , Na Lei , Sylvain Eimer , Dafiné Ravelosona

Abstract

We report direct observation of charge accumulation effect on magnetization reversal in a Pt/Co(0.5 nm)/Pt(0.5 nm)/Al2O3 structure with perpendicular anisotropy. By imaging magnetic domain with polar Kerr microscopy, we evidence that positive charges accumulating at the Pt/Al2O3 interface result in favoring magnetic domain wall propagation, while negative charges hinder domain wall nucleation and propagation. Our results suggest that magnetic properties in Co layer can be strongly influenced by 5d electron accumulation/depletion in an ultrathin Pt layer.

Keywords

charge accumulation effect magnetic domain wall nucleation domain wall propagation Pt/Co/Pt/Al2O3 structure perpendicular anisotropy polar Kerr microscopy 5d electron accumulation

Cite

@article{arxiv.1201.5917,
  title  = {Interfacial charge accumulation effect on magnetic domain wall nucleation and propagation in a Pt/Co/Pt/Al2O3 structure},
  author = {Weiwei Lin and Nicolas Vernier and Guillaume Agnus and Na Lei and Sylvain Eimer and Dafiné Ravelosona},
  journal= {arXiv preprint arXiv:1201.5917},
  year   = {2019}
}

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4 pages, 4 figures, added references

Interfacial charge accumulation effect on magnetic domain wall nucleation and propagation in a Pt/Co/Pt/Al2O3 structure

Abstract

Keywords

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