Magnetic and transport properties of micron size magnetic particulate arrays fabricated on a 2D superconducting Nb films and sub-micron magnetic wires

Yoshichika Otani, Kazuaki Fukamichi, Osamu Kitakami, Yutaka Shimada, Bernard Pannetier, Jean Pierre Nozieres, Tsuyoshi Matsuda, Akira Tonomura

研究成果: Conference article査読

31 被引用数 (Scopus)

抄録

Micron size particulate arrays of amorphous R-Co (R = Sm and Gd) alloys with a thickness of 200 nm were fabricated on top of a 20 nm thick Nb film by means of e-beam lithography and sputter deposition. The arrays consist of 2 × 2 μm2 square particles with a spatial periodicity of 4 μm along an edge of the square. Interesting oscillations due to the fluxoid quantization were observed both in the transition lines and the magnetization curves of the underlying Nb film. The superconducting state of the Nb film was found to be modulated by stray fields of the square magnetic particles. Sub-micron size ferromagnetic Fe wires were also prepared in order to investigate the magnetoresistance effect associated with pinning and depinning processes of a magnetic domain wall confined in the wire. Low temperature transport, Lorentz microscopy and electron holography measurements demonstrated a clear change in resistivity associated with the depinning of a pinned single domain wall.

本文言語English
ページ(範囲)215-225
ページ数11
ジャーナルMaterials Research Society Symposium - Proceedings
475
出版ステータスPublished - 1997 12 1
イベントProceedings of the 1997 MRS Spring Meeting - San Francisco, CA, USA
継続期間: 1997 3 311997 4 2

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

フィンガープリント

「Magnetic and transport properties of micron size magnetic particulate arrays fabricated on a 2D superconducting Nb films and sub-micron magnetic wires」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル