Room Temperature Ferromagnetic (Fe1–x Co x )3BO5 Nanorods

Cobalt-doped ferroferriborate ((Fe1–x Co x )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. Magnet...

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Bibliographic Details
Published in:Nano letters 2014-07, Vol.14 (7), p.3914-3918
Main Authors: He, Shuli, Zhang, Hongwang, Xing, Hui, Li, Kai, Cui, Hongfei, Yang, Chenguang, Sun, Shouheng, Zeng, Hao
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Magnetic properties and materials
Materials science
Methods of nanofabrication
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanotubes
Physics
Small particles and nanoscale materials
Studies of specific magnetic materials
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Summary:Cobalt-doped ferroferriborate ((Fe1–x Co x )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.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl501193x