Dynamic Micromagnetic Simulation of the Configurational Anisotropy of Nanoelements
Josef Fidler, Thomas Schrefl, Dieter Süss, and Werner Scholz
IEEE Transactions on Magnetics,
Volume: 37 Issue: 4,
July 2001,
2058-2060
A finite element method was used to simulate the magnetization reversal of
nanostructured Ni80Fe20 elements with zero anisotropy.
The numerical results
show a strong influence of the size of the cubic and platelet shaped (square
and triangular) elements on the switching field. The calculated switching
fields range from mu0*H = 0.002 to 0.6 T.
Differences of the demagnetizing field
which arise when the field is applied in different directions, lead to
configurational anisotropy effects. Platelet shaped elements show identical
switching behavior in different directions within the platelet plane.
Inhomogeneous magnetization reversal processes become dominant with
increasing element size >=100 nm and strongly influence the switching behavior.
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Feb. 13, 2001