Brillouin light scattering (BLS) measurements were performed for (17-120)Angstrom thick Cu/Ni/Cu/Si(001) films. A monotonic dependence of thefrequency of the uniform mode on an in-plane magnetic field H was observedboth on increasing and on decreasing H in the range (2-14) kOe, suggestingthe absence of a metastable collinear perpendicular ground state. Furtherinvestigation by magneto-optical vector magnetometry (MOKE-VM) in anunconventional canted-field geometry provided evidence for a domainstructure where the magnetization is canted with respect to theperpendicular to the film. Spin wave calculations confirm the absence ofstable collinear configurations.
Absence of Stable Collinear Configurations in Ni(001) Ultrathin Films: Canted Domain Structure as Ground State
G. Gubbiotti;G. Carlotti;M. G. Pini;P. Politi;A. Rettori;
2002
Abstract
Brillouin light scattering (BLS) measurements were performed for (17-120)Angstrom thick Cu/Ni/Cu/Si(001) films. A monotonic dependence of thefrequency of the uniform mode on an in-plane magnetic field H was observedboth on increasing and on decreasing H in the range (2-14) kOe, suggestingthe absence of a metastable collinear perpendicular ground state. Furtherinvestigation by magneto-optical vector magnetometry (MOKE-VM) in anunconventional canted-field geometry provided evidence for a domainstructure where the magnetization is canted with respect to theperpendicular to the film. Spin wave calculations confirm the absence ofstable collinear configurations.| File | Dimensione | Formato | |
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