鉄基強磁性酸化物スパッタ薄膜における磁界誘導電気分極

DOI NDLデジタルコレクション Web Site 被引用文献6件 参考文献6件

書誌事項

タイトル別名
  • Magnetic-Field-Induced Electric Polarization in Iron-Based Ferromagnetic Oxide Sputtered Films.
  • テツキ キョウジセイ サンカブツ スパッタ ハクマク ニ オケル ジカイ ユウドウ デンキ ブンキョク

この論文をさがす

抄録

In our previous papers, it was reported that the dielectric permeability εr' is subject to change with magnetic field H, Δεr'(H) in ferromagnetic nano-composite oxide films with the Bi2O3-Fe2O3-PbTiO3 ternary system. In the present study, we first measured the temperature dependence of εr' and Δεr'(H). Both quantities increase rapidly above 50°C, which suggests that softening of the glass network of the dielectric matrix takes place at this temperature to promote the charge displacement giving rise to the dielectric polarization. Next, we measured the magnetic field dependence of the displacement current Jd(H) to confirm whether the permeability change with magnetic field Δεr'(H) is intrinsic. It was found that Jd(H) is also subject to change in a similar manner to Δεr'(H), indicating that the charge displacement assisted by H really occurs. Finally, we observed the dielectric polarization induced by applying a small ac magnetic field at room temperature. This is considered to be a new type of electromagnetic effect. To explain the experimental results, we propose a simple model based on magnetization rotation of ferromagnetic nano-clusters dispersed in a dielectric glassy matrix.

収録刊行物

被引用文献 (6)*注記

もっと見る

参考文献 (6)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ