Article (Scientific journals)
Synthesis and magnetic properties of cobalt nanocubes
Gräf, C. P.; Birringer, R.; MICHELS, Andreas
2006In Physical Review. B, Condensed Matter and Materials Physics, 73 (21), p. 2124011-2124014
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Abstract :
[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.
Disciplines :
Physics
Identifiers :
UNILU:UL-ARTICLE-2010-505
Author, co-author :
Gräf, C. P.;  Technische Physik, Universität des Saarlandes, Germany
Birringer, R.;  Technische Physik, Universität des Saarlandes, Germany
MICHELS, Andreas  ;  Technische Physik, Universität des Saarlandes, Germany
Language :
English
Title :
Synthesis and magnetic properties of cobalt nanocubes
Publication date :
2006
Journal title :
Physical Review. B, Condensed Matter and Materials Physics
ISSN :
1550-235X
Publisher :
American Physical Society, Woodbury, United States - New York
Volume :
73
Issue :
21
Pages :
2124011-2124014
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 24 April 2013

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