1307.6479 (N. Vernier et al.)

Measurement of magnetization using domain compressibility in CoFeB films
with perpendicular anisotropy    [PDF]

N. Vernier, J. P. Adam, S. Eimer, G. Agnus, T. Devolder, T. Hauet, B. Ockert, D. Ravelosona

We present a method to map the saturation magnetization of soft ultrathin films with perpendicular anisotropy, and we illustrate it to assess the compositional dependence of the magnetization of CoFeB(1 nm)/MgO films. The method relies on the measurement of the dipolar repulsion of parallel domain walls that define a linear domain. The film magnetization is linked to the field compressibility of the domain. The method also yields the minimal distance between two walls before their merging, which sets a practical limit to the storage density in spintronic devices using domain walls as storage entities.

View original: http://arxiv.org/abs/1307.6479