ISSN:
1432-0630
Schlagwort(e):
PACS: 75.70Ak; 75.30Gw; 73.20
;
r
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Maschinenbau
,
Physik
Notizen:
Abstract. Nickel allows to study the largest variety of phenomena in the magnetism of UHV ultrathin films. The low critical temperature of ≈630 K for the bulk favors experiments from 0 K to above T c and from one monolayer to infinite thick films. The thickness dependence of T c (d) for the (001) and the (111) orientation is compared. Susceptibility measurements in UHV are presented, and from χmax the film geometry can be deduced. Ferromagnetic resonance measures the second- and fourth-order anisotropy constants. These give a clear understanding of when and how the reorientation transition from the in-plane to the perpendicular orientation occurs and its nature. Magnetic resonance and circular X-ray dichroism measure the spin and orbital parts of the magnetic moment μ, its anisotropy Δμ, and the 3d and 4sp contributions. Finally, we show how a 4 Monolayer (ML) Ni (001) film can be transformed into NiO by controlled oxygen dosage and thermal treatment.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/s003390050318
