Electric-field effect on spin-wave resonance in a nanoscale CoFeB/MgO magnetic tunnel junction

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Abstract

We investigate the electric-field effect on the exchange stiffness constant in a CoFeB/MgO junction through the observation of the spin-wave resonance in a nanoscale magnetic tunnel junction. We evaluate the electric-field dependence of the stiffness constant from the separation between resonance fields for the Kittel and spin-wave modes under electric fields. The obtained stiffness constant increases when the interfacial electron density is decreased. This dependence is consistent with that determined from the observation of electric-field dependent domain structures.

Original languageEnglish
Article number072403
JournalApplied Physics Letters
Volume111
Issue number7
DOIs
Publication statusPublished - 2017 Aug 14

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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