2014年
Coナノアイランドの磁化反転メカニズム
表面科学
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- 巻
- 35
- 号
- 7
- 開始ページ
- 377
- 終了ページ
- 382
- 記述言語
- 日本語
- 掲載種別
- DOI
- 10.1380/jsssj.35.377
- 出版者・発行元
- 公益社団法人 日本表面科学会
An outstanding challenging in nanomagnetism is the quantitative understanding of magnetization reversal process of nanostructures. We investigate the magnetization reversal of individual Co islands on Cu(111). We measure switching fields <i>H</i><sub>SW</sub> of single Co islands using spin-polarized scanning tunneling microscopy/spectroscopy at 8 K. The switching field changes with island size. The switching field increases with size and reaches a maximum value of 2.4 T at a size of 5500 atoms, and decreases for larger islands. To discuss magnetization reversal processes, we extract the energy barrier &Delta;<i>E</i> for magnetization reversal as a function of island size. Our analysis reveals a crossover of the magnetization reversal from an exchange-spring behavior to domain wall formation with increasing size at around 7500 atoms.
- リンク情報
- ID情報
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- DOI : 10.1380/jsssj.35.377
- ISSN : 0388-5321
- CiNii Articles ID : 130004486912
- identifiers.cinii_nr_id : 9000257984482