Magnetic and magnetotransport properties in nanogranular Co/C 60-Co film with high magnetoresistance

Seiji Sakai, Kay Yakushiji, Seiji Mitani, Isamu Sugai, Koki Takanashi, Hiroshi Naramoto, Pavel V. Avramov, Vasily Lavrentiev, Kazumasa Narumi, Yoshihito Maeda

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Magnetic properties were investigated for the alternately deposited film of C60 and Co which has found to exhibit tunnel magnetoresistance (MR) of 10-80%. Magnetic field and temperature dependences of magnetization showed typical superparamagnetic behaviors with the blocking temperature of 40 K. The magnetization curve at 300 K was well fitted by the Langevin function with the size distribution of Co particles, and the mean diameter and size distribution were evaluated to be 3.1 nm and ∼1 nm, respectively. Based on the magnetic properties, the structure and magnetotransport properties are discussed in details.

Original languageEnglish
Pages (from-to)754-758
Number of pages5
JournalMaterials Transactions
Volume48
Issue number4
DOIs
Publication statusPublished - 2007 Apr 1

Keywords

  • Bias voltage dependence
  • C-Co compound
  • Co nanoparticle
  • Magnetic property
  • Nanogranular film
  • Raman analysis
  • Tunnel magnetoresistance

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Sakai, S., Yakushiji, K., Mitani, S., Sugai, I., Takanashi, K., Naramoto, H., Avramov, P. V., Lavrentiev, V., Narumi, K., & Maeda, Y. (2007). Magnetic and magnetotransport properties in nanogranular Co/C 60-Co film with high magnetoresistance. Materials Transactions, 48(4), 754-758. https://doi.org/10.2320/matertrans.48.754