Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-03-02
Physical Review B 84, 024404 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
6 pages, 7 figures
Scientific paper
10.1103/PhysRevB.84.024404
We study the remanent domain configurations of rectangular permalloy antidot lattices over a range of lattice parameters. The influence of antidot diameter, antidot spacing, and the aspect ratio of the lattice on the remanent domain configuration are investigated by magnetic force microscopy and supported by micromagnetic simulations. In the remanent state, areas of cells with the same orientation of average magnetization form magnetic super domains separated by super domain walls (SDWs). Two types of SDWs are identified. The first type is characterized by low stray field energy, is linear, and expands over many lattice constants. In contrast the second type shows high stray field energy and is situated at kinks of low energy SDWs. Its width can vary from a minimum of two lattice cells up to several lattice constants, depending on the lattice parameters. The occurrence and structure of these two types of SDWs as function of lattice parameters are classified and discussed in terms of the interplay of stray field and exchange energy.
Hu X. K.
Janke V.
Müller Achim
Schumacher Hans Werner
Sievers Sibylle
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