Control of the static and high-frequency magnetic properties of perpendicular anisotropic Co-HfN granular films through insertion of HfN interlayers

Yang Cao, Yiwen Zhang, Shigehiro Ohnuma, Nobukiyo Kobayashi, Hiroshi Masumoto

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We propose a multilayer granular structure wherein Hf-nitride (HfN) interlayers are inserted into Co-HfN granular films with perpendicular magnetic anisotropy (PMA) to control their static and high-frequency magnetic properties. The transition between soft ferromagnetic properties and PMA was achieved by varying the thickness of Co-HfN layers (2-30 nm) and HfN interlayers (1-4 nm). The resonance frequency of the Co-HfN (24 nm)/HfN films decreased from 2 to 0.9GHz with increasing HfN interlayer thickness, owning to the separation of the columnar granules and reduced interlayer interaction between Co-HfN granular layers via a HfN interlayer.

Original languageEnglish
Article number040307
JournalJapanese journal of applied physics
Volume56
Issue number4
DOIs
Publication statusPublished - 2017

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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