Correlation between switching field and microstructure of individual Co/Pt dots

Nobuaki Kikuchi, Yusuke Murayama, Yasukazu Murakami, Satoshi Okamoto, Daisuke Shindo, Osamu Kitakami

研究成果: Article査読

1 被引用数 (Scopus)

抄録

The correlation between the microstructure and the magnetization switching field of individual Co/Pt multilayer nanodots with Pt or Ta/Pt underlayers has been investigated by transmission electron microscopy and magnetic force microscopy. The insertion of a 2-nm-thick Ta underlayer promoted the Co/Pt [111] crystal axis orientation and improved the mean switching field and the switching field distribution of nanodot arrays with a diameter of 70nm from 1.4 to 6.9 kOe and from 22 to 8%, respectively. Electron microscopy of individual dots has revealed that all the nanodots without the Ta layer contain (200)-oriented grains, which possibly work as nucleation sites owing to a small perpendicular magnetic anisotropy. However, no structural difference is found among the dots having the same underlayers, suggesting the existence of other factors affecting the switching field distribution.

本文言語English
論文番号103002
ジャーナルJapanese journal of applied physics
51
10
DOI
出版ステータスPublished - 2012 10

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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