At present the main activities
of the group are
A) XMCD
, EXAFS :
The local adsorption geometry and dynamics of low Z atoms and molecules
on single crystal metal surfaces (BMBF-Grant)
B) FMR ,
ac susceptibility , SQUID and STM :
The correlation of structure, morphology and magnetism of metallic
films with few atomic layers, coupling effects of trilayers, Curie temperatures,
anisotropy energy (SFB290 DFG-Grant )
The orientation, dissociation and dynamics of light
atoms and molecules is studied by angular and temperature dependent
NEXAFS and
SEXAFS experiments performed at the Berlin
synchrotron radiation source BESSY II and the ESRF, Grenoble. The magnetic
properties of ultrathin films are studied in UHV
in situ as a function
of temperature, field and angle by
XMCD
,
MEXAFS ,
FMR ,
SQUID,
MOKE and
ac
susceptibility . The work focuses on the understanding of the origin
of the magnetic anisotropy energy, on the para- to ferromagnetic phase
transition and interlayer coupling between magnetic films.
All the substrates are prepared and characterized in UHV by standard
surface analytical methods. Growth of atomic layers is monitored by Auger
electron spectroscopy, MEED and
STM .
The surface structure is determined by LEED. In addition to these
in
situ experiments
VSM magnetometry has
been performed on magnetic multilayers and high T
c superconductors.