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Nano Lett. 2014 Jul 9;14(7):3914-8. doi: 10.1021/nl501193x. Epub 2014 Jun 12.

Room temperature ferromagnetic (Fe₁-xCox)₃BO₅ nanorods.

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  • 1Department of Physics and §Department of Chemistry, Capital Normal University , Beijing 100048, P. R. China.

Abstract

Cobalt-doped ferroferriborate ((Fe1-xCox)3BO5) nanorods (NRs) are synthesized by a one-pot high-temperature organic-solution-phase method. The aspect ratios of the NRs are tuned by the heating rate. These NRs form via anisotropic growth along twin boundaries of the multiply twinned nuclei. Magnetic properties are dramatically modified by Co substitutional doping, changing from antiferromagnetic order at low temperatures to ferromagnetic above room temperature, with a greatly enhanced magnetic ordering temperature. These anisotropic ferromagnetic NRs with a high ordering temperature may provide a new platform for understanding nanomagnetism and for magnetic applications.

PMID:
24905634
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