Dynamics of Spontaneous Magnetization Reversal in Exchange Biased Heterostructures

Details Dynamics of Spontaneous Magnetization Reversal in Exchange Biased Heterostructures Dynamics of Spontaneous Magnetization Reversal in Exchange Biased Heterostructures

2006-12-05

arxiv.org/abs/cond-mat/0612113v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.76.014423

The dependence of thermally induced spontaneous magnetization reversal on time-dependent cooling protocols was studied. Slower cooling and longer waiting close to the N\`{e}el temperature of the antiferromagnet ($T_N$) enhances the magnetization reversal. Cycling the temperature around $T_N$ leads to a thermal training effect under which the reversal magnitude increases with each cycle. These results suggest that spontaneous magnetization reversal is energetically favored, contrary to our present understanding of positive exchange bias.

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