Research Abstract


Spin-motive force due to a gyrating magnetic vortex

2012年5月22日 Nature Communications 3 : 845 doi: 10.1038/ncomms1824


田辺 賢士1, 千葉 大地1,2, 大江 純一郎3,4,5, 葛西 伸哉1,6, 河野 浩7, S. E. Barnes8, 前川 禎通4,5, 小林 研介1 & 小野 輝男1

  1. 京都大学 化学研究所
  2. 科学技術振興機構(JST)PRESTO
  3. 東邦大学 物理学科
  4. 日本原子力研究開発機構 先端基礎研究センター
  5. 科学技術振興機構(JST)CREST
  6. 物質・材料研究機構
  7. 大阪大学 大学院基礎工学研究科
  8. マイアミ大学(米国)
A change of magnetic flux through a circuit induces an electromotive force. By analogy, a recently predicted force that results from the motion of non-uniform spin structures has been termed the spin-motive force. Although recent experiments seem to confirm its presence, a direct signature of the spin-motive force has remained elusive. Here we report the observation of a real-time spin-motive force produced by the gyration of a magnetic vortex core. We find a good agreement between the experimental results, theory and micromagnetic simulations, which taken as a whole provide strong evidence in favour of a spin-motive force.