Electronic structure and magnetic properties of epitaxial FeRh(001) ultrathin films on W(100)

Abstract

Epitaxial FeRh(100) films (CsCl structure, $\\sim 10\\ ML\\ $ thick), prepared\n{\\it in-situ} on a W(100) single crystal substrate, have been investigated via\nvalence band and core level photoemission. The presence of the\ntemperature-induced, first-order, antiferromagnetic to ferromagnetic\n(AF$\\rightarrow$ FM) transition in these films has been verified via linear\ndichroism in photoemission from the Fe 3$p$ levels. Core level spectra indicate\na large moment on the Fe atom, practically unchanged in the FM and AF phases.\nJudging from the valence band spectra, the metamagnetic transition takes place\nwithout substantial modification of the electronic structure. In the FM phase,\nthe spin-resolved spectra compare satisfactorily to the calculated\nspin-polarized bulk band structure.\n