Magnetic properties of monodispersed Co/CoO clusters

D. L. Peng, K. Sumiyama, T. Hihara, S. Yamamuro, T. J. Konno

研究成果: Article査読

183 被引用数 (Scopus)

抄録

Monodispersed Co/CoO cluster assemblies with the mean cluster sizes of 6 and 13 nm have been prepared by a plasma-gas condensation type cluster beam deposition apparatus. We measured the effects of the oxygen gas flow rate during deposition, temperature, and cluster size on the coercivity and hysteresis loop shift induced by field cooling. The large exchange bias field (10.2 kOe) and coercivity (5 kOe) were observed at 5 K for the monodispersed Co/CoO cluster assembly with d=6 nm. The correlations between unidirectional anisotropy and uniaxial anisotropy, training effect and magnetic relaxation can be interpreted by the hypothesis of a spin disorder in the interfacial layer between the antiferromagnetic CoO shell and the ferromagnetic Co core.

本文言語English
ページ(範囲)3103-3109
ページ数7
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
61
4
DOI
出版ステータスPublished - 2000

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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