ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We report on the novel effect of magnetic dichroism in core level photoemission from ferromagnets with circularly polarized synchrotron radiation in the soft x-ray range. Depending on the relative orientation of photon spin and sample magnetization (parallel or antiparallel), a single core level emission line may be resolved into two lines of different intensities. The mechanism is shown to be due to spin-selective dipole transitions from exchange-split core levels in the presence of spin-orbit interaction. Experiments on the 2p1/2 and 2p3/2levels of Fe are compared to fully relativistic photoemission calculations. Rather good qualitative and quantitative agreement is found. The effect does not rely on the spin-split empty density of states near the Fermi energy, but probes the exchange splitting of core levels directly. Because of its surface sensitivity, x-ray dichroism in photoemission may serve as a new powerful tool in surface and interface magnetism.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.348789
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