Dresden 2003 – wissenschaftliches Programm

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MA: Magnetismus

MA 22: Magnetische dünne Schichten III

MA 22.9: Vortrag

Donnerstag, 27. März 2003, 12:15–12:30, HSZ/04

Electronic structure of thin films of Cr(110) — •Serguei Molodtsov¹, Frederik Schiller¹, Denis Vyalikh², Vito Servedio¹, and Clemens Laubschat¹ — ¹Institut für Oberflächen- und Mikrostrukturphysik, TU Dresden — ²Institut für Experimentalphysik, FU Berlin

In spite of numerous experimental and theoretical studies the electronic structure of thin films of transition metals remains a challenging task until now. The interest is in part driven by their possible technological use as spacer or magnetic layers in magnetic multilayer structures [1]. While the surface electronic properties may strongly influence magnetic coupling at the interfaces of the magnetic multilayers, the bulk electronic structure is responsible for propagation of the magnetic interaction through the spacers.

In the present contribution we report on a photoemission (PE) study of electronic structure of thin epitaxial films of Cr(110) grown in situ onto a W(110) substrate. Valence-band PE spectra and Fermi surfaces measured with PE for film of various thicknesses (from 10 to 100Å) at different temperatures are analyzed using results of LKKR calculations performed within the one-step model of PE. Surface states were found in the region of the Fermi-energy gap, which is expected in the antiferromagnetic phase due to the spin-density wave excitation.

[1] M.N. Babich et al., Phys. Rev. Lett. 61, 2472 (1988); L.M. Falicov, Phys. Today 45, 46 (1992)