Absence of stable collinear configurations in Ni(001)ultrathin films: canted domain structure as ground state

Details Absence of stable collinear configurations in Ni(001)ultrathin films: canted domain structure as ground state Absence of stable collinear configurations in Ni(001)ultrathin films: canted domain structure as ground state

2001-11-15

arxiv.org/abs/cond-mat/0111270v2

Phys. Rev. B 65, 214420 (2002)

Physics

Condensed Matter

Materials Science

6 pages, 3 figures (text, appendix and 1 figure added)

Scientific paper

10.1103/PhysRevB.65.214420

Brillouin light scattering (BLS) measurements were performed for (17-120) Angstrom thick Cu/Ni/Cu/Si(001) films. A monotonic dependence of the frequency of the uniform mode on an in-plane magnetic field H was observed both on increasing and on decreasing H in the range (2-14) kOe, suggesting the absence of a metastable collinear perpendicular ground state. Further investigation by magneto-optical vector magnetometry (MOKE-VM) in an unconventional canted-field geometry provided evidence for a domain structure where the magnetization is canted with respect to the perpendicular to the film. Spin wave calculations confirm the absence of stable collinear configurations.

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