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- W2024932484 abstract "We report on the synthesis, structure, and magnetic properties of cobalt nanoparticles with cubic shape. The nanoparticles with an average cube-edge length of about $50phantom{rule{0.3em}{0ex}}mathrm{nm}$ were prepared by wet-chemical processing and characterized by electron microscopy, x-ray diffraction, and magnetometry. The x-ray data indicate a mixture of hcp Co and $ϵtext{ensuremath{-}}mathrm{Co}$. From the magnetization measurements we deduce on the presence of a ferromagnet/antiferromagnet $mathrm{Co}∕mathrm{Co}mathrm{O}$ interface, which gives rise to a pronounced exchange-bias effect. Between $350phantom{rule{0.3em}{0ex}}mathrm{K}$ and $5phantom{rule{0.3em}{0ex}}mathrm{K}$ the coercivity ${H}_{C}$ increases by almost a factor of 6, whereas the exchange-bias field ${H}_{E}$ takes on a value of about $380phantom{rule{0.3em}{0ex}}mathrm{Oe}$ at $5phantom{rule{0.3em}{0ex}}mathrm{K}$ and vanishes above $75phantom{rule{0.3em}{0ex}}mathrm{K}$. The variation of ${H}_{C}$ with temperature cannot be understood in terms of the various conventional types of magnetic anisotropy." @default.
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- W2024932484 date "2006-06-01" @default.
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- W2024932484 title "Synthesis and magnetic properties of cobalt nanocubes" @default.
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- W2024932484 doi "https://doi.org/10.1103/physrevb.73.212401" @default.
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