Low-temperature magnetotransport and magnetic properties of cobalt-doped amorphous carbon thin films

Ruihe Tang, Wei Liu, Zhengjun Zhang, Ronghai Yu, Xiaofang Liu, Bai Yang, Mizuguchi Masaki, Takanashi Koki

研究成果: Article査読

抄録

A series of Co-doped amorphous carbon granular thin films with various Co contents (x, at%) were deposited on n-type Si (100) substrates by a magnetron co-sputtering technique at room temperature. The microstructure, magnetotransport and magnetic properties of the Co-C films have been characterized. By optimizing Co content, giant negative magnetoresistances (MRs) were observed at low temperature, with a maximum MR ratio of 27.6% at 2 K under an applied magnetic field of 90×79.6 kA·m-1 for the film with Co content of 6.4 at%. As Co content increases from 6.4 at% to 16.4 at%, the MR ratio decreases gradually from 27.6% to 2.2%. A linear lnρ-T-1/2 relationship indicates that the spin transport in Co6.4C93.6 thin film agrees well with tunneling conductance.

本文言語English
ページ(範囲)1887-1890
ページ数4
ジャーナルXiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
41
11
出版ステータスPublished - 2012 11

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

フィンガープリント

「Low-temperature magnetotransport and magnetic properties of cobalt-doped amorphous carbon thin films」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