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RESEARCH PRODUCT

Spin polarisation and dichroism in ARUPS from thin rare earth films

M. SchicketanzJonder MoraisGerd SchönhenseAndreas OelsnerGerhard H. FecherGerhard H. FecherN. A. CherepkovJ. BraunM. GüntherJohn Liesegang

subject

PhysicsCircular dichroismRadiationElectron spectrometerMagnetismSynchrotron Radiation SourceSynchrotron radiationAngle-resolved photoemission spectroscopyDichroismCondensed Matter PhysicsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsCondensed Matter::Materials ScienceCrystallographyCondensed Matter::Strongly Correlated ElectronsPhysical and Theoretical ChemistryAtomic physicsSpin (physics)Spectroscopy

description

Abstract In the present study, spin polarisation and dichroism were investigated in angular resolved VUV photoemission ARUPS from magnetised as well as paramagnetic rare earth surfaces. Thin Gd(0001) films were prepared epitaxially on W(110). The photoelectrons were excited by polarised synchrotron radiation from the BESSY I synchrotron radiation source. A SPLEED detector attached to an electron spectrometer mounted on a single axis goniometer was used for angular resolved spin analysis. The main part of this work focused on the characteristic surface state of Gd(0001) which shows a splitting, as previously observed by linear magnetic dichroism and spin polarised photoemission. The spin analysis shows that the two observed states have opposite spin characters. Additionally, the non-magnetic circular dichroism suggests j =3/2 character for the surface state. The experimental findings are compared to atomic models and one-step photoemission calculations.

yearjournalcountryeditionlanguage
2001-03-01Journal of Electron Spectroscopy and Related Phenomena
https://doi.org/10.1016/s0368-2048(00)00404-7