Author(s)

Yajing Zhang, Siu-Wing Or, Zhidong Zhang

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High-purity magnetic CoNi submicrospherical chains, each of length 20 μm - 30 μm and self-assembled from fcc-phase CoNi submicrospheres of average diameter 800 nm, are synthesized via a surfactant-assisted solvothermal route without the aid of nucleation agent. The effects of surfactant and reducing agent on the morphology and size of the CoNi chains are studied, and a possible growth mechanism for the CoNi chains is proposed. The CoNi chains show ferromagnetic characteristics with a similarly small saturation magnetization of 104.1 emu/g and a larger coercivity of 150 Oe at room temperature compared to the monodispersed CoNi submicrospheres of 105 emu/g and 34 Oe as a result of the increased shape anisotropy.

Chain-Like Assembles, CoNi, Magnetic Properties, Morphology, Solvothermal Route, Submicrospherical Chains

Y. Zhang, S. Or and Z. Zhang, "Synthesis, Structure and Magnetic Properties of CoNi Submicrospherical Chains," Advances in Materials Physics and Chemistry, Vol. 1 No. 2, 2011, pp. 7-13. doi: 10.4236/ampc.2011.12002.