Reference : Synthesis and magnetic properties of cobalt nanocubes
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/587
Synthesis and magnetic properties of cobalt nanocubes
English
Gräf, C. P. [Technische Physik, Universität des Saarlandes, Germany]
Birringer, R. [Technische Physik, Universität des Saarlandes, Germany]
Michels, Andreas mailto [Technische Physik, Universität des Saarlandes, Germany]
2006
Physical Review. B, Condensed Matter and Materials Physics
American Physical Society
73
21
2124011-2124014
Yes (verified by ORBilu)
1098-0121
1550-235X
Woodbury
NY
[en] 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 50 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 ϵ-Co. From the magnetization measurements we deduce on the presence of a ferromagnet/antiferromagnet Co/CoO interface, which gives rise to a pronounced exchange-bias effect. Between 350 K and 5 K the coercivity HC increases by almost a factor of 6, whereas the exchange-bias field HE takes on a value of about 380 Oe at 5 K and vanishes above 75 K. The variation of HC with temperature cannot be understood in terms of the various conventional types of magnetic anisotropy.
http://hdl.handle.net/10993/587
10.1103/PhysRevB.73.212401

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