95 citations · 514 across the 23 of their papers we have counts for
23 papers
NiTi Single Crystal Growth by Micro-Pulling-Down Method: Experimental Setup and Material Characterization
Timon Sieweke, Chris Luther, Martin Wortmann +14
Nickel-titanium that has an austenite to martensite phase transition has been studied extensively in the past as a shape memory alloy, but a lot remains to be learned from such pha…
Reactive additive capillary stamping with double network hydrogel-derived aerogel stamps under solvothermal conditions
Fatih Alarslan, Martin Frosinn, Kevin Ruwisch +9
Integration of solvothermal reaction products into complex thin-layer architectures is frequently achieved by combinations of layer transfer and subtractive lithography, whereas di…
Solvent-Free High-Temperature Capillary Stamping of Stimuli-Responsive Polymers: Wettability Management by Orthogonal Substrate Functionalization
Fatih Alarslan, Hanna Hübner, Jonas Klein +5
The wettability of surfaces determines their antifouling, antifogging, anti-icing, and self-cleaning properties as well as their usability for sensing, oil-water separation, water…
Phenolic Resin Dual-Use Stamps for Capillary Stamping and Decal Transfer Printing
Leiming Guo, Jonas Klein, Jannis Thien +4
We report an optimized two-step thermopolymerization process carried out in contact with micropatterned molds that yields porous phenolic resin dual-use stamps with topographically…
Time-resolved diffraction and photoelectron spectroscopy investigation of the reactive molecular beam epitaxy of ultrathin films
Tobias Pohlmann, Martin Hoppe, Jannis Thien +10
We present time-resolved high energy x-ray diffraction (tr-HEXRD), time-resolved hard x-ray photoelectron spectroscopy (tr-HAXPES) and time-resolved grazing incidence small angle x…
Role of NiO in the nonlocal spin transport through thin NiO films on YFeO
Geert R. Hoogeboom, Geert-Jan N. Sint Nicolaas, Andreas Alexander +5
In spin transport experiments with spin currents propagating through antiferromagnetic (AFM) material, the antiferromagnet is treated as a mainly passive spin conductor not generat…
Cation- and lattice-site-selective magnetic depth profiles of ultrathin (001) films
Tobias Pohlmann, Timo Kuschel, Jari Rodewald +7
A detailed understanding of ultrathin film surface properties is crucial for the proper interpretation of spectroscopic, catalytic and spin-transport data. We present x-ray magneti…
Enhanced magnetization of ultrathin NiFeO films on SrTiO(001) related to cation disorder and anomalous strain
J. Rodewald, J. Thien, K. Ruwisch +3
NiFeO thin films with varying thickness were grown on SrTiO(001) by reactive molecular beam epitaxy. Soft and hard x-ray photoelectron spectroscopy measurements reveal…
Impact of magnetic moment and anisotropy of CoFe thin films on the magnetic proximity effect of Pt
Panagiota Bougiatioti, Orestis Manos, Olga Kuschel +4
We present a systematic study of the magnetic proximity effect in Pt, depending on the magnetic moment and anisotropy of adjacent metallic ferromagnets. Element-selective x-ray res…
Steel-Based Electrocatalysts for Efficient and Durable Oxygen Evolution in Acidic Media
Helmut Schäfer, Karsten Küpper, Mercedes Schmidt +10
High overpotentials, particularly an issue of common anode materials, hamper the process of water electrolysis for clean energy generation. Thanks to immense research efforts up to…
Quadratic magnetooptic spectroscopy setup based on photoelastic light modulation
Robin Silber, Michaela Tomíčková, Jari Rodewald +4
In most of the cases the magnetooptic Kerr effect (MOKE) techniques rely solely on the effects linear in magnetization (). Nevertheless, a higher-order term being proportio…
X20CoCrWMo10-9//Co3O4: a Metal-Ceramic Composite with Unique Efficiency Values for Water-Splitting in Neutral Regime
Helmut Schäfer, Daniel M. Chevrier, Karsten Küpper +7
Water splitting allows the storage of solar energy into chemical bonds (H2+O2) and will help to implement the urgently needed replacement of limited available fossil fuels. Particu…
Real-time monitoring of the structure of ultra thin FeO films during growth on Nb-doped SrTiO(001)
Olga Kuschel, Wanja Spiess, Tobias Schemme +3
In this work thin magnetite films were deposited on SrTiO via reactive molecular beam epitaxy at different substrate temperatures. The growth process was monitored in-situ duri…
Quantitative disentanglement of spin Seebeck, proximity-induced and intrinsic anomalous Nernst effect in NM/FM bilayers
Panagiota Bougiatioti, Christoph Klewe, Daniel Meier +8
We identify and investigate thermal spin transport phenomena in sputter-deposited Pt/NiFeO () bilayers. We separate the voltage generated by th…
Impact of strain and morphology on magnetic properties of FeO/NiO bilayers grown on Nb:SrTiO(001) and MgO(001)
Olga Kuschel, Nico Pathé, Tobias Schemme +7
We present a comparative study on the morphology and structural as well as magnetic properties of crystalline FeO/NiO bilayers grown on both MgO(001) and SrTiO(001) sub…
Static Magnetic Proximity Effect in Pt Layers on Sputter-Deposited NiFe2O4 and on Fe of Various Thicknesses Investigated by XRMR
Timo Kuschel, Christoph Klewe, Panagiota Bougiatioti +7
The longitudinal spin Seebeck effect is detected in sputter-deposited NiFe2O4 films using Pt as a spin detector and compared to previously investigated NiFe2O4 films prepared by ch…
Electronic and magnetic structure of epitaxial NiO/FeO(001) heterostructures grown on MgO(001) and Nb-doped SrTiO(001)
K. Kuepper, O. Kuschel, N. Pathé +8
We study the underlying chemical, electronic and magnetic properties of a number of magnetite based thin films. The main focus is placed onto NiO/FeO(001) bilayers grown on…
From FeO/NiO bilayers to NiFeO-like thin films through Ni interdiffusion
O. Kuschel, R. Buß, W. Spiess +7
Ferrites with (inverse) spinel structure display a large variety of electronic and magnetic properties making some of them interesting for potential applications in spintronics. We…
Static magnetic proximity effect in Pt/NiFe bilayers investigated by x-ray resonant magnetic reflectivity
Christoph Klewe, Timo Kuschel, Jan-Michael Schmalhorst +6
We present x-ray resonant magnetic reflectivity (XRMR) as a very sensitive tool to detect proximity induced interface spin polarization in Pt/Fe, Pt/NiFe, Pt/Ni$_{81}…
Structure and morphology of epitaxially grown Fe3O4/NiO bilayers on MgO(001)
Tobias Schemme, Olga Kuschel, Florian Bertram +2
Crystalline Fe3O4/NiO bilayers were grown on MgO(001) substrates using reactive molecular beam epitaxy to investigate their structural properties and their morphology. The film thi…
Link between local iron coordination, Fe 2p XPS core level line shape and Mg segregation into thin magnetite films grown on MgO(001)
M. Suendorf, T. Schemme, A. Thomas +2
A well ordered Fe(001) ultra thin film epitaxially grown on MgO(001) has been oxidized by post deposition annealing in oxygen atmosphere. LEED patterns indicate the formation of ma…
Sign change in the tunnel magnetoresistance of Fe3O4/MgO/Co-Fe-B magnetic tunnel junctions depending on the annealing temperature and the interface treatment
Luca Marnitz, Karsten Rott, Stefan Niehörster +12
Magnetite (Fe3O4) is an eligible candidate for magnetic tunnel junctions (MTJs) since it shows a high spin polarization at the Fermi level as well as a high Curie temperature of 58…
Static magnetic proximity effect in Pt/NiFe2O4 and Pt/Fe bilayers investigated by x-ray resonant magnetic reflectivity
Timo Kuschel, Christoph Klewe, Jan-Michael Schmalhorst +11
The spin polarization of Pt in Pt/NiFe2O4 and Pt/Fe bilayers is studied by interface-sensitive x-ray resonant magnetic reflectivity to investigate static magnetic proximity effects…