Research Papers in Physics and Astronomy


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Published by American Institute of Physics. J. Applied Physics 87, 6334 (2000). ©2000 American Institute of Physics. Permission to use.


It is demonstrated that the magnetostatic demagnetizing factor is not the only sample-shape dependent contribution to the hysteresis loop. There are also exchange contributions, which lead to interesting effects, particularly in nanostructures. An example is the recently discovered bulging mode in two-phase nanomagnets. The bulging mode exhibits the angular symmetry of the coherent mode, but it is incoherent due to its radial variation and gives rise to negative demagnetizing factors.

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