Abstract
We report on a systematic study of the temperature dependences ofthe magnetic exchange splittings of two different valence statesacross the lanthanide series. Depending on the valence state,Stoner-like and spin-mixing behaviour are observed, with vanishingand persisting magnetic splitting, respectively, in the paramagneticphases. The magnitudes of the splittings are found to scalelinearly with the 4f spin moment, with no anomalies observed inantiferromagnetic phases. The results were obtained by means ofangle-resolved photoemission from thin metal films grown epitaxiallyon W(110). The films were further characterized in situ inultrahigh vacuum as regards their crystalline and magneticstructures using x-ray scattering and resonant magnetic x-raydiffraction, respectively.
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