Angle-dependent Ni2+ X-ray magnetic linear dichroism: interfacial coupling revisited |
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Authors: | Arenholz Elke van der Laan Gerrit Chopdekar Rajesh V Suzuki Yuri |
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Institution: | Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. earenholz@lbl.gov |
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Abstract: | 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. |
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