Regensburg 2019 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 14: Postersession KFM

KFM 14.14: Poster

Mittwoch, 3. April 2019, 16:00–18:30, Poster C

Substrate dependant crystalline phases of TmFeO3 thin films — •Sven Becker, Mathias Kläui, and Gerhard Jakob — Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany

TmFeO3 (TFO) has orthorhombic structure in bulk and does not show ferroelectric polarization. S.-J. Ahn [1] has demonstrated that TFO grows in a hexagonal phase on Al2O3 substrates, which imposes mulitferroic properties. In this work we prepare TFO thin films on various substrates by pulsed laser deposition and observe both orthorhombic as well as hexagonal phase of TFO depending on the choice of substrate material. In a second step we evaluate the possibility to use TFO as a purely antiferromagnetic random access memory. Kosub [2] has shown this approach using Cr2O3. The antiferromagnetic state of multiferroic material is read out by anomalous hall effect in a platinum top layer. [1] S.-J. Ahn et al., J. Mater. Chem. C 4, 4521(2014) [2] T. Kosub et al., Nat. Comm. 8, 13985 (2017)

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