第265回 応用セラミックス研究所講演会（Mr.Kévin Franke, Department of Applied Physics, Aalto University, Finland）
| 開催日時 | 2014年02月03日 13:30-15:00 |
|---|---|
| 開催場所 | 東京工業大学 すずかけ台キャンパス J2棟19階1904号室 総理工会議室１ |
| 主催 | 応用セラミックス研究所 |
| 連絡先 | 伊藤・谷山研究室 谷山 智康 (5632) |
プログラム等
講師：Mr. Kévin Franke (Department of Applied Physics, Aalto University, Finland）
講演テーマ：Domain Wall Interactions in Ferroelectric-Ferromagnetic Heterostructures
講演概要:Magnetoelectric coupling in multiferroic heterostructures can produce large modulations of magnetic anisotropy enabling the imprinting of ferroelectric domains into ferromagnetic films. We report on the properties of ferromagnetic domain walls elastically coupled to ferroelectric domain boundaries in a CoFe/BaTiO3 heterostructure. We demonstrate that competing energies lead to the breakdown of domain pattern transfer below a critical domain size. Moreover, rotation of an external magnetic field results in abrupt transitions between two scaling regimes. Secondly, due to strong coupling between ferromagnetic domain walls and ferroelectric domain boundaries we can demonstrate reversible electric field driven magnetic domain wall motion in Fe/BaTiO3. Micromagnetic simulations reveal several dynamic regimes in this novel driving mechanism.
