Publications (26)
Analysis of the Annealing Budget of Metal Oxide Thin-Film Transistors Prepared by an Aqueous Blade-Coating Process
Tianyu Tang, Preetam Dacha, Katherina Haase +12
Metal oxide (MO) semiconductors are widely used in electronic devices due to their high optical transmittance and promising electrical performance. This work describes the advancem…
Multilayer metamaterials with mixed ferromagnetic domain core and antiferromagnetic domain wall structure
Ruslan Salikhov, Fabian Samad, Sebastian Schneider +7
Magnetic nano-objects possess great potential for more efficient data processing, storage and neuromorphic type of applications. Using high perpendicular magnetic anisotropy synthe…
On-liquid-gallium surface synthesis of ultra-smooth conductive metal-organic framework thin films
Jinxin Liu, Yunxu Chen, Xing Huang +18
Conductive metal-organic frameworks (MOFs) are emerging electroactive materials for (opto-)electronics. However, it remains a great challenge to achieve reliable MOF-based devices…
Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains
Martin Mayer, Pavel L. Potapov, Darius Pohl +6
Chains of metallic nanoparticles sustain strongly confined surface plasmons with relatively low dielectric losses. To exploit these properties in applications,such as waveguides, t…
Structural Reinforcement in Mechanically Interlocked Two-Dimensional Polymers by Suppressing Interlayer Sliding
Ye Yang, André Knapp, David Bodesheim +12
Preserving the superior mechanical properties of monolayer two-dimensional (2D) materials when transitioning to bilayer and layer-stacked structures poses a great challenge, primar…
Magnetic properties of single nanomagnets: EMCD on FePt nanoparticles
Sebastian Schneider, Darius Pohl, Stefan Löffler +5
Energy-loss magnetic chiral dichroism (EMCD) allows for the quantification of magnetic properties of materials at the nanometer scale. It is shown that with the support of simulati…
Chemical Aspects of the Antiferromagnetic Topological Insulator MnBiTe
Alexander Zeugner, Frederik Nietschke, Anja U. B. Wolter +25
Crystal growth of MnBiTe has delivered the first experimental corroboration of the 3D antiferromagnetic topological insulator state. Our present results confirm that th…
From soft to hard magnetic Fe-Co-B by spontaneous strain: A combined first principle and thin film study
Ludwig Reichel, Ludwig Schultz, Darius Pohl +6
In order to convert the well-known Fe-Co-B alloy from a soft to a hard magnet, we propose tetragonal strain by interstitial boron. Density functional theory reveals that when B ato…
In-situ monitoring the magnetotransport signature of topological transitions in the chiral magnet MnPtSn
Andy Thomas, Darius Pohl, Alexander Tahn +8
Emerging magnetic fields related to the presence of topologically protected spin textures such as skyrmions are expected to give rise to additional, topology-related contributions…
Characterizing the Structure of 3D DNA Origami in a Transmission Electron Microscope
Alyna Ong, Christoph Hadlich, Taekyu Jeong +5
DNA origami nanostructures provide programmable control over nanoscale geometry but remain challenging to image due to their low atomic number. Here, we systematically evaluate ima…
STEM EBIC as a Quantitative Probe of Semiconductor Devices
Sebastian Schneider, Sebastian Beckert, René Hammer +3
Electron beam-induced current (EBIC) imaging in the scanning transmission electron microscope (STEM), STEM-EBIC, provides direct access to carrier transport at the nanoscale. While…
Lateral Solid Phase Epitaxy of Yttrium Iron Garnet
Sebastian Sailler, Darius Pohl, Heike Schlörb +4
Solid phase epitaxy is a crystallization technique used to produce high quality thin films. Lateral solid phase epitaxy furthermore enables the realization of non-planar structures…
Coherent interfacial bonding on the FeAs tetrahedron in Fe/Ba(Fe(1-x)Co(x))2As2 bilayers
Thomas Thersleff, Kazumasa Iida, Silvia Haindl +9
We demonstrate the growth of epitaxial Fe/Ba(Fe(1-x)Co(x))2As2 (Fe/Ba-122) bilayers on MgO(001) and LSAT(001) single crystal substrates using Pulsed Laser Deposition (PLD). By expl…
Intra-wire coupling in segmented Ni/Cu nanowires deposited by electrodeposition
Philip Sergelius, Ji Lee, Olivier Fruchart +18
Segmented magnetic nanowires are a promising route for the development of three dimensional data storage techniques. Such devices require a control of the coercive field and the co…
DNA mold-based fabrication of continuous silver nanostructures
Christoph Hadlich, Borja Rodriguez-Barea, Darius Pohl +3
Bottom-up fabrication of inorganic nanostructures is emerging as an alternative to classical top-down approaches, offering precise nanometer-scale control at relatively low cost an…
Noise Estimation and Suppression in Quantitative EMCD Measurements
Hitoshi Makino, Bernd Rellinghaus, Sebastian Schneider +2
Quantitative electron magnetic circular dichroism (EMCD) in transmission electron microscopy (TEM) enables the measurement of magnetic moments with elemental and atomic site sensit…
Control of stripe domain wall magnetization in perpendicular anisotropy multilayers
Ruslan Salikhov, Fabian Samad, Benny Böhm +8
We report on the controlled switching of domain wall (DW) magnetization in aligned stripe domain structures, stabilized in [Co (0.44 nm)/Pt (0.7 nm)] (, 100, 150) multi…
Increased magnetocrystalline anisotropy in epitaxial Fe-Co-C thin films with spontaneous strain
Ludwig Reichel, George Giannopoulos, Sandra Kauffmann-Weiss +8
Rare earth free alloys are in focus of permanent magnet research since the accessibility of the elements needed for nowadays conventional magnets is limited. Tetragonally strained…
Probing magnetic properties at the nanoscale: In-situ Hall measurements in a TEM
Darius Pohl, Yejin Lee, Dominik Kriegner +4
We report on advanced in-situ magneto-transport measurements in a transmission electron microscope. The approach allows for concurrent magnetic imaging and high resolution structur…
Detuning the Honeycomb of the α-RuCl3 Kitaev lattice: A case of Cr3+ dopant
Maria Roslova, Jens Hunger, Gaël Bastien +9
Fine-tuning chemistry by doping with transition metals enables new perspectives for exploring Kitaev physics on a two-dimensional (2D) honeycomb lattice of α-RuCl3, which is promi…
Direct identification of local doping effects in Barium-hexaferrite by electron vortex beams
Darius Pohl, Hitoshi Makino, Arthur Ernst +4
We demonstrate atomic-scale mapping of local magnetic moments and doping effects in Ti-doped barium hexaferrite (BaFe11TiO19) using atom-sized electron vortex beams (EVBs) with con…
Spin-to-charge conversion in orthorhombic RhSi topological semimetal crystalline thin films
Surya N. Panda, Qun Yang, Darius Pohl +10
The rise of non-magnetic topological semimetals, which provide a promising platform for observing and controlling various spin-orbit effects, has led to significant advancements in…
EMCD with an electron vortex filter: Limitations and possibilities
Thomas Schachinger, Stefan Löffler, Andreas Steiger-Thirsfeld +5
We discuss the feasibility of detecting spin polarized electronic transitions with a vortex filter. This approach does not rely on the principal condition of the standard energy lo…
On the origin of perpendicular magnetic anisotropy in strained Fe-Co(-X) films
Ludwig Reichel, Alexander Edström, Darius Pohl +4
Very high magnetic anisotropies have been theoretically predicted for strained Fe-Co(-X) and indeed several experiments on epitaxial thin films seemed to confirm strain induced ani…
Antiferromagnetic Domain Wall Control via the Surface Spin Flop in Fully Tunable Synthetic Antiferromagnets with Perpendicular Magnetic Anisotropy
Benny Böhm, Lorenzo Fallarino, Darius Pohl +4
Antiferromagnetic (AF) domain walls have recently attracted revived attention, not only in the emerging field of AF spintronics, but also more specifically for offering fast domain…
Induction Mapping of the 3D-Modulated Spin Texture of Skyrmions in Thin Helimagnets
Sebastian Schneider, Daniel Wolf, Matthew J. Stolt +8
Envisaged applications of skyrmions in magnetic memory and logic devices crucially depend on the stability and mobility of these topologically non-trivial magnetic textures in thin…