STATIC AND DYNAMIC PROPERTIES OF PATTERNED MAGNETIC PERMALLOY-FILMS

Citation
B. Hillebrands et al., STATIC AND DYNAMIC PROPERTIES OF PATTERNED MAGNETIC PERMALLOY-FILMS, Journal of magnetism and magnetic materials, 175(1-2), 1997, pp. 10-15
Citations number
10
ISSN journal
03048853
Volume
175
Issue
1-2
Year of publication
1997
Pages
10 - 15
Database
ISI
SICI code
0304-8853(1997)175:1-2<10:SADPOP>2.0.ZU;2-L
Abstract
Static magnetic and spin-wave properties of square lattices of permall oy micron dots with thicknesses of 500 Angstrom and 1000 Angstrom and with varying dot separations have been investigated. The spin-wave fre quencies can be well described taking into account the demagnetization factor of each single dot. A magnetic fourfold anisotropy was found f or the lattice with dot diameters of 1 mu m and a dot separation of 0. 1 mu m. The anisotropy is attributed to an anisotropic dipole-dipole i nteraction between magnetically unsaturated parts of the dots. The ani sotropy strength (order of 10(5) erg/cm(3)) decreases with increasing in-plane applied magnetic field.