Berlin 2024 – scientific programme

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O: Fachverband Oberflächenphysik

O 39: Poster: Metal Substrates

O 39.8: Poster

Tuesday, March 19, 2024, 18:00–20:00, Poster D

Design of a simple and highly reliable evaporator for rare-earth metals — •Tobias Edelmann, Patrick Härtl, Markus Leisegang, and Matthias Bode — Physikalisches Institut, Experimentelle Physik II, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany

Rare-earth metals exhibit versatile structural, electronic, optical, and magnetic properties. In our technology-based society, there is a significant demand for these metals in various applications, both in applied and basic research. Since the high chemical reactivity of rare-earth metals essentially impedes the preparation of clean surfaces from bulk crystals, their properties are usually studied as thin films which are epitaxially grown on highly pure mono-crystalline substrates. To guarantee the chemical purity of rare earth metal films, we have developed a simple and highly reliable evaporator design. Mounted on a DN35CF-sized electrical feedthrough, this home-built evaporator does not require any external cooling but still remains stable over extended periods of times, facilitating even the deposition of thick layers [1]. The design details will be presented in-depth in this poster, showcasing its application by the characterization of one specific evaporant by means of spin-polarized scanning tunneling microscopy.

[1] P. Härtl et al., Phys. Rev. B 105, 174431 (2022).

Keywords: Rare-earth; Home-built; Evaporator; UHV; Metal deposition