Real-Time Monitoring the Growth of Epitaxial CoxFe3- xO4 Ultrathin Films on Nb-Doped SrTiO3(001) via Reactive Molecular Beam Epitaxy by Means of Operando HAXPES

Kevin Ruwisch; Tobias Pohlmann; Florian Bertram; Christoph Schlüter; Andrei Gloskovskii; Karsten Küpper; Joachim Wollschläger

doi:10.3390/ma15072377

Real-Time Monitoring the Growth of Epitaxial Co_xFe_{3- x}O₄ Ultrathin Films on Nb-Doped SrTiO₃(001) via Reactive Molecular Beam Epitaxy by Means of Operando HAXPES

Materials (Basel). 2022 Mar 23;15(7):2377. doi: 10.3390/ma15072377.

Authors

Kevin Ruwisch¹, Tobias Pohlmann^{1

2}, Florian Bertram², Christoph Schlüter², Andrei Gloskovskii², Karsten Küpper¹, Joachim Wollschläger¹

Affiliations

¹ Department of Physics, Osnabrück University, 49076 Osnabrück, Germany.
² Deutsches Elektronen-Synchrotron (DESY), Photon Science, 22607 Hamburg, Germany.

Abstract

In this work, we present a comprehensive study on real-time monitoring the growth of epitaxial Co_xFe_3-xO₄ thin films grown on SrTiO₃(001) substrates via reactive molecular beam epitaxy. The growth process was monitored during evaporation by means of time resolved operando hard X-ray photoelectron spectroscopy (HAXPES). We prepared ultrathin ferrite films using different oxygen partial pressures, showing pure metallic, light oxidic, and cobalt ferrite-like growth. Additional X-ray diffraction measurements confirm HAXPES results.

Keywords: cobalt ferrite; growth study; operando HAXPES; ultrathin films.

Abstract

Grants and funding