Observation of Rotation of Spin-Polarization with the Verwey Transition at a Surface of a <110>-Oriented Magnetite Whisker by Field-Emitted Electron Polarimetry

• Nagai S.

  Graduate School of Engineering, Mie University, Japan

• Hata K.

  Graduate School of Engineering, Mie University, Japan

• Okada M.

  Research Institute of Electronics, Shizuoka University, Japan

• Mimura H.

  Research Institute of Electronics, Shizuoka University, Japan

抄録

We observed the Verwey transition, i. e., metal-insulator transition, in a spin-polarization of field-emitted electrons from a topmost surface of a <110>-oriented magnetite whisker by means of field-emitted electron polarimetry. With a rise in temperature of the whisker to about 120 K, the polarization of field-emitted electrons increased from 4 to 11% with a rotation of its direction. The rotation angle corresponds to a change of magnetic easy axis from <001> to <111> direction caused by the Verwey transition. This result reveals that the Verwey transition occurs even at a surface as well as in a bulk. [DOI: 10.1380/ejssnt.2011.322]

収録刊行物

• e-Journal of Surface Science and Nanotechnology

  e-Journal of Surface Science and Nanotechnology 9 322-325, 2011

  公益社団法人 日本表面真空学会

キーワード

• Field emission microscopy
• Field emission
• Magnetic phenomena
• iron oxide
• Electron spin polarization

詳細情報

• CRID: 1390001205185947648
• NII論文ID: 130004934150
• DOI: 10.1380/ejssnt.2011.322
• ISSN: 13480391
• Web Site: http://www.jstage.jst.go.jp/article/ejssnt/9/0/9_0_322/_pdf
• 本文言語コード: en
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可