Magnetotransport properties of Co-C granular thin films depending on the carbon sputtering power

J. G. Kang, M. Mizuguchi, K. Takanashi

研究成果: Conference contribution

抄録

CoxC1-x granular films were deposited on Si substrates by a co-sputtering method. A large negative MR of 30.3% was obtained at 2 K for the sample prepared with the sputtering power of 50 W (C) and 4 W (Co). We have studied structural properties of Co-C granular films by Raman spectroscopy. Two peaks (D and G modes) from carbon bonds were clearly observed, and the intensity ratio of two peaks changed with the sputtering power, suggesting that the graphitization was promoted with the sputtering power. It was also revealed that the transport mechanism changed from tunneling to Mott's variable range hopping and MR decreased with the sputtering power.

本文言語English
ホスト出版物のタイトルNew Trends and Developments in Nanomagnetism
ページ1-6
ページ数6
DOI
出版ステータスPublished - 2012
イベント2012 MRS Spring Meeting - San Francisco, CA, United States
継続期間: 2012 4 92012 4 13

出版物シリーズ

名前Materials Research Society Symposium Proceedings
1458
ISSN(印刷版)0272-9172

Other

Other2012 MRS Spring Meeting
国/地域United States
CitySan Francisco, CA
Period12/4/912/4/13

ASJC Scopus subject areas

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

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