Ferromagnetic resonance in nanoscale CoFeB/MgO magnetic tunnel junctions

E. Hirayama, S. Kanai, H. Sato, F. Matsukura, H. Ohno

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

We investigate the junction size dependence of magnetic properties of a CoFeB free layer in CoFeB/MgO magnetic tunnel junctions (MTJs) by homodyne-detected ferromagnetic resonance, where the diameter of the circular MTJs is varied from 35nm to 100nm. We observe the increase of the effective perpendicular magnetic anisotropy field and the apparent damping constant in the free layers with decreasing diameter.

Original languageEnglish
Article number17B708
JournalJournal of Applied Physics
Volume117
Issue number17
DOIs
Publication statusPublished - 2015 May 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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