Isolated epitaxial Co(5 nm ≤ tCo ≤ 30 nm)/Cu nanostructures have been fabricated on a Si(001) substrate by using a nanoporous anodic aluminum-oxide (AAO) film as a mask during evaporation. The structural and the magnetic properties of the nanostructures are compared with those of as-grown films. The results of X-ray diffraction confirm that both the film and the nanostructure have a fee structure with a (001) surface and a Co//Cu//Si crystallographic relation in the plane. The nanostructures with tCo ≥ 10 nm show clear four-fold symmetry of the remanent magnetization in the plane, but due to dipole interactions among nanodots, their values are smaller than those of films. The nanostructure with tCo = 5 nm shows isotropic hysteresis loops while the film with the same thickness shows a four-fold symmetry.
|Number of pages||4|
|Journal||Journal of the Korean Physical Society|
|Publication status||Published - 2006 Sep|
ASJC Scopus subject areas
- Physics and Astronomy(all)