Uniform magnetic properties for an ultrahigh-density lattice of noninteracting Co nanostructures

We report on the magnetic properties of two-dimensional Co nanoparticles arranged in macroscopically phase-coherent superlattices created by self-assembly on Au(788). Our particles have a density of 26 Tera/in(2) (1 Tera=10(12)), are monodomain, and have uniaxial out-of-plane anisotropy. The distribution of the magnetic anisotropy energies has a half width at half maximum of 17%, a factor of 2 more narrow than the best results reported for superlattices of three-dimensional nanoparticles. Our data show the absence of magnetic interactions between the particles. Co/Au(788) thus constitutes an ideal model system to explore the ultimate density limit of magnetic recording.


Published in:
Physical Review Letters, 95, 15
Year:
2005
ISSN:
0031-9007
ISBN:
0031-9007
Keywords:
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 Record created 2009-04-14, last modified 2018-09-13

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