We have investigated the magnetic properties of iron deposited on Si(111)-(7x7), Si(111)-(√3x√3)Ag and Si3N 4/Si(111)-(8x8) by x-ray absorption spectroscopy and x-ray magnetic circular dichroism measurements. By choosing the surface, it is possible to control the interaction of Fe atoms with Si atoms and to govern the spin magnetic moment of iron. The magnetic moment of 1.6 ML-Fe is almost lost on the clean surface, while that of 1.6ML-Fe on the Si3N4 surface remains completely. About a half of the magnetic moment of bcc-Fe is obtained by depositing Fe on the Ag modified Si(111) surface. In addition, it is found that the magnetic moment of Fe on the Ag modified Si(111) surface is lost easily by annealing at 500 K. On the other hand, that of Fe on the Si 3N4 surface is sufficiently kept even when the sample is annealed at 500 K.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2013|
|Event||15th International Conference on X-Ray Absorption Fine Structure, XAFS 2012 - Beijing, China|
Duration: Jul 22 2012 → Jul 28 2012
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)