Abstract
The spin-resolved electronic structure at the (110) surface of the magnetic alloy ${\mathrm{FeNi}}_{3}$ has been studied with spin-polarized inverse photoemission spectroscopy in conjunction with first-principles electronic structure calculations. An unoccupied $\overline{Y}$ Schockley surface state in a bulk band gap is observed that is exchange split by 320 meV, indicating that the topmost surface layer is ferromagnetically ordered.
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