Electric-field modulation of exchange stiffness in MgO/CoFeB with perpendicular anisotropy

T. Dohi; S. Kanai; A. Okada; F. Matsukura; H. Ohno

Electric-field modulation of exchange stiffness in MgO/CoFeB with perpendicular anisotropy

Materials Science 2016-03-29 v1

Authors: T. Dohi , S. Kanai , A. Okada , F. Matsukura , H. Ohno

Abstract

We observe magnetic domain structures of MgO/CoFeB with a perpendicular magnetic easy axis under an electric field. The domain structure shows a maze pattern with electric-field dependent isotropic period. We find that the electric-field modulation of the period is explained by considering the electric-field modulation of the exchange stiffness constant in addition to the known magnetic anisotropy modulation.

Keywords

electric-field modulation exchange stiffness MgO/CoFeB perpendicular anisotropy magnetic domain structures maze pattern magnetic anisotropy

Cite

@article{arxiv.1603.08280,
  title  = {Electric-field modulation of exchange stiffness in MgO/CoFeB with perpendicular anisotropy},
  author = {T. Dohi and S. Kanai and A. Okada and F. Matsukura and H. Ohno},
  journal= {arXiv preprint arXiv:1603.08280},
  year   = {2016}
}

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