Speaker
Armin Kleibert
(Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland)
Description
We have observed a quadratic x-ray magneto-optical effect in near-normal-incidence reflection at the M edges of iron [1]. The effect appears as the magnetically induced rotation of ~0.1° of the polarization plane of linearly polarized x-ray radiation upon reflection. A comparison of the measured rotation spectrum with results from x-ray magnetic linear dichroism data demonstrates that this is the first observation of the Schaefer-Hubert effect in the x-ray regime. Ab initio density-functional theory calculations reveal that hybridization effects of the 3p core states necessarily need to be considered when interpreting experimental data. The discovered magneto-x-ray effect holds promise for future ultrafast and element-selective studies of ferromagnetic as well as antiferromagnetic materials.
[1] S. Valencia, A. Kleibert, A. Gaupp, J. Rusz, D. Legut, J. Bansmann, W. Gudat, and P. M. Oppeneer, Phys. Rev. Lett. 104, 187401 (2010)
Author
Armin Kleibert
(Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland)
Co-authors
Andreas Gaupp
(Helmholtz-Zentrum-Berlin, BESSY, Albert-Einstein-Straße 15, D-12489 Berlin, Germany)
Dominik Legut
(Department of Physics and Materials Science, Uppsala University, Box 530, S-751 21 Uppsala, Sweden)
Jan Rusz
(Department of Physics and Materials Science, Uppsala University, Box 530, S-751 21 Uppsala, Sweden)
Joachim Bansmann
(Institute of Surface Chemistry and Catalysis, Universitaet Ulm, D-89069 Ulm, Germany)
Peter Oppeneer
(Department of Physics and Materials Science, Uppsala University, Box 530, S-751 21 Uppsala, Sweden)
Sergio Valencia
(Helmholtz-Zentrum-Berlin, BESSY, Albert-Einstein-Straße 15, D-12489 Berlin, Germany)
Wolfgang Gudat
(Helmholtz-Zentrum-Berlin, BESSY, Albert-Einstein-Straße 15, D-12489 Berlin, Germany)
