Magnetic and Magnetotransport Properties in Nanogranular Co/C60-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

doi:10.2320/matertrans.48.754

Magnetic and Magnetotransport Properties in Nanogranular Co/C₆₀-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

著者情報

キーワード: C₆₀-Co compound, Co nanoparticle, nanogranular film, tunnel magnetoresistance, magnetic property, Raman analysis, bias voltage dependence

ジャーナルフリー

2007 年 48 巻 4 号 p. 754-758

DOI https://doi.org/10.2320/matertrans.48.754

詳細

抄録

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.

責任著者(Corresponding author)

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