Angle-dependent Ni2+ X-ray magnetic linear dichroism: interfacial coupling revisited.
Using x-ray magnetic linear dichroism (XMLD) for magnetometry requires detailed knowledge of its dependence on the relative orientation of polarization, magnetic moments, and crystallographic axes. We show that Ni2+ L(2,3) XMLD in cubic lattices has to be described as a linear combination of two fundamental spectra--not one as previously assumed. The spectra are calculated using atomic multiplet theory and the angular dependence is derived from crystal field symmetry. Applying our results to Co/NiO(001) interfaces, we find perpendicular coupling between Ni and Co moments.
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. earenholz@lbl.gov
Elke
E
Arenholz
Gerrit
G
van der Laan
Rajesh V
RV
Chopdekar
Yuri
Y
Suzuki