Domain wall structure in magnetic bilayers with perpendicular anisotropy

Details Domain wall structure in magnetic bilayers with perpendicular anisotropy Domain wall structure in magnetic bilayers with perpendicular anisotropy

2010-04-23

arxiv.org/abs/1004.4088v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Author adresses AB, SR, JM and AT: Laboratoire de Physique des Solides, CNRS, Universit\'e Paris Sud, UMR 8502, 91405 Orsay Ce

Scientific paper

We study the magnetic domain wall structure in magnetic bilayers (two ultrathin ferromagnetic layers separated by a non magnetic spacer) with perpendicular magnetization. Combining magnetic force and ballistic electron emission microscopies, we are able to reveal the details of the magnetic structure of the wall with a high spatial accuracy. In these layers, we show that the classical Bloch wall observed in single layers transforms into superposed N\'eel walls due to the magnetic coupling between the ferromagnetic layers. Quantitative agreement with micromagnetic calculations is achieved.

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