Gruyters M, Bernhard T, Winter H
Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, 12489 Berlin, Germany.
Phys Rev Lett. 2005 Jun 10;94(22):227205. doi: 10.1103/PhysRevLett.94.227205. Epub 2005 Jun 9.
The magnetization reversal of ultrathin Co films on Cu(001) has been investigated by grazing ion scattering and magneto-optical Kerr effect. Differences in the behavior of surface and bulk magnetization are found and attributed to the reduced coordination and site symmetry at the surface. The reversal behavior of the surface magnetization depends on the chemical surface composition. For pure Co films, the reversal of the bulk magnetization is preceded by a complete reversal of the surface magnetization. A particular magnetic state of the surface is suggested as a precursor for magnetization reversal.
通过掠入射离子散射和磁光克尔效应研究了Cu(001)上超薄Co薄膜的磁化反转。发现了表面和体相磁化行为的差异，并将其归因于表面配位和位点对称性的降低。表面磁化的反转行为取决于化学表面组成。对于纯Co薄膜，体相磁化的反转之前表面磁化会完全反转。一种特定的表面磁态被认为是磁化反转的前驱体。
