Six-fold configurational anisotropy and magnetic reversal in nanoscale Permalloy triangles

Details Six-fold configurational anisotropy and magnetic reversal in nanoscale Permalloy triangles Six-fold configurational anisotropy and magnetic reversal in nanoscale Permalloy triangles

2009-06-12

arxiv.org/abs/0906.2322v1

Physics

Condensed Matter

Materials Science

3 pages, 4 figures

Scientific paper

Six-fold configurational anisotropy was studied in Permalloy triangles, in which the shape symmetry order yields two energetically non-degenerate micromagnetic configurations of the spins, the so-called "Y" and "buckle" states. A twelve pointed switching astroid was measured using magneto-optical experiments and successfully reproduced numerically, with different polar quadrants identified as specific magnetic transitions, thereby giving a comprehensive view of the magnetic reversal in these structures. A detailed analysis highlighted the necessity to include the physical rounding of the structures in the simulations to account for the instability of the Y state.

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