Domain structure in CoFeB thin films with perpendicular magnetic anisotropy

Details Domain structure in CoFeB thin films with perpendicular magnetic anisotropy Domain structure in CoFeB thin films with perpendicular magnetic anisotropy

2012-02-23

arxiv.org/abs/1202.5128v1

IEEE Magn. Lett. 2, 3000304 (2011)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1109/LMAG.2011.2159484

Domain structures in CoFeB-MgO thin films with a perpendicular easy magnetization axis were observed by magneto-optic Kerr-effect microscopy at various temperatures. The domain wall surface energy was obtained by analyzing the spatial period of the stripe domains and fitting established domain models to the period. In combination with SQUID measurements of magnetization and anisotropy energy, this leads to an estimate of the exchange stiffness and domain wall width in these films. These parameters are essential for determining whether domain walls will form in patterned structures and devices made of such materials.

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