A5015682536- Radio Frequency Integrated Circuit Design
- Advanced Power Amplifier Design
- Intermetallics and Advanced Alloy Properties
- Rare-earth and actinide compounds
- High-Temperature Coating Behaviors
- Advancements in Battery Materials
- Metallurgical and Alloy Processes
- Advanced Battery Materials and Technologies
- Advanced materials and composites
- Microwave Engineering and Waveguides
- Metal and Thin Film Mechanics
- Ferroelectric and Piezoelectric Materials
- High Temperature Alloys and Creep
- Nuclear Materials and Properties
- Inorganic Chemistry and Materials
- GaN-based semiconductor devices and materials
- Iron-based superconductors research
- X-ray Diffraction in Crystallography
- Magnetic Properties of Alloys
- Advanced ceramic materials synthesis
- Electromagnetic Compatibility and Noise Suppression
- Metallurgical Processes and Thermodynamics
- Bone Tissue Engineering Materials
- Acoustic Wave Resonator Technologies
- Chemical Synthesis and Characterization
Forschungszentrum Jülich
2016-2025
Fraunhofer Institute for Ceramic Technologies and Systems
2024-2025
Stockholm University
2005-2024
Ecological Society of America
2016-2023
Ernst Ruska Centre
2023
Purdue University West Lafayette
2023
John Wiley & Sons (United States)
2016-2018
IFC Research (United Kingdom)
2018
Jülich Aachen Research Alliance
2018
Leibniz Institute for Solid State and Materials Research
2015-2016
Bulk-type SSLB based on LLZ:Ta achieves high specific areal capacity and operational current densities.
Materials with a $5{d}^{4}$ electronic configuration are generally considered to have nonmagnetic ground state ($J=0$). Interestingly, ${\mathrm{Sr}}_{2}{\mathrm{YIrO}}_{6}$ (${\mathrm{Ir}}^{5+}$ having configuration) was recently reported exhibit long-range magnetic order at low temperature and the distorted ${\mathrm{IrO}}_{6}$ octahedra were discussed cause magnetism in this material. Hence, comparison of structurally cubic ${\mathrm{Ba}}_{2}{\mathrm{YIrO}}_{6}$ may shed light on source...
Tibia trabeculae and vertebrae of rats as well human femur were investigated by high-resolution TEM at the atomic scale in order to reveal snapshots morphogenetic processes local bone ultrastructure formation. By taking into account reflections hydroxyapatite for Fourier filtering appearance individual alpha-chains within triple-helix clearly shows that bears feature an intergrowth composite structure extending from nanoscale, thus representing a molecular collagen apatite. Careful analysis...
The $d$-electron low temperature magnet ${\mathrm{NbFe}}_{2}$ is poised near the threshold of magnetism at ambient pressure, and can be tuned across associated quantum critical point by adjusting precise stoichiometry within ${\mathrm{Nb}}_{1\ensuremath{-}y}{\mathrm{Fe}}_{2+y}$ homogeneity range. In a nearly single crystal ($y=\ensuremath{-}0.01$), we observe ${T}^{3/2}$ power-law dependence resistivity $\ensuremath{\rho}$ on $T$ logarithmic Sommerfeld coefficient $\ensuremath{\gamma}=C/T$...
Piezoelectric ceramics of the composition Na 0.5 K NbO 3 (NKN) with grain sizes in range 0.2–1 μm were fabricated by spark plasma sintering. Ferroelectric domain size decreases decreasing and non‐180° ferroelectric domains walls still visible 200 nm sized grains. The Curie point was independent. This suggests that critical for a single structure NKN is <200 nm. Optimized processing conditions enabled high densities (>99.5% theoretical density) to be made at T ≥850°C. For dense (grain...
Abstract The development of reliable and affordable all‐solid‐state sodium metal batteries (ASS‐SMBs) requires suitable solid‐state electrolytes with cost‐efficient processing stabilized electrode/electrolyte interfaces. Here, an integrated porous/dense/porous Na 5 YSi 4 O 12 (NYS) trilayered scaffold is designed fabricated by tape casting using aqueous slurries. In this template‐based NYS scaffold, the dense layer in middle serves as a separator porous layers on both sides accommodate...
The high chromium nickel base alloy 602 CA is used as construction material for temperature components in aggressive environments such gas burners or heat exchangers. oxidation behaviour of this characterised by the formation an external Cr2O3 scale and internal precipitation alumina. main goal present investigation was to elucidate effect aluminum on subscale depletion phenomena. concentration profiles were found be flat sometimes even increasing towards oxide-alloy interface. experimental...
Abstract Conductive ceramics currently play a vital role in human life. In practical applications, most conductive are polycrystalline, and their overall conductivity ( σ total ) is influenced by both bulk grain boundary resistances R gb , respectively). While mainly of academic interest, often determines the quality ceramic component. Currently, studies discussing influence specific methods on typically related to individual ceramics. this study, it discovered that addition 0.5–3 mol%...
Nowadays, the fabrication of multi-material components with desired geometries and tailored microstructural properties is drawing continuous attention. By laminating or additive manufacturing subsequent co-sintering, composites that combine a wide range favorable can be produced. Examples are metal-ceramic laminates multi-ceramic composites, which not only open spectrum material applications but also provide higher degree flexibility than single materials. However, undesired deformation...
Sodium vanadium triphosphate (Na3V2(PO4)3, NVP) is a promising cathode material for Na-ion batteries. Due to its intrinsically low electronic conductivity, it usually mixed or coated with carbon. However, so far there have been no systematic studies on the ionic and conductivity of carbon-coated NVP particles. In this work, varying carbon contents are prepared. The powders sintered as single pellets sandwiched between solid electrolyte measurements in an ion blocking non-ion configuration....
We present a systematic study of transport and thermodynamic properties the Laves phase system Nb$_{1-y}$Fe$_{2+y}$. Our measurements confirm that Fe-rich samples, as well those rich in Nb (for $\mid y\mid\geq 0.02$), show bulk ferromagnetism at low temperature. For stoichiometric NbFe$_2$, on other hand, magnetization, magnetic susceptibility magnetoresistance results point towards spin-density wave (SDW) order, possibly helical, with small ordering wavevector $Q \sim 0.05$ \AA$^{-1}$....
We present a systematic study of the electronic specific-heat jump ($\ensuremath{\Delta}{C}_{\mathrm{el}}$) at superconducting transition temperature ${T}_{c}$ ${\text{K}}_{1\ensuremath{-}x}$${\text{Na}}_{x}$${\text{Fe}}_{2}$${\text{As}}_{2}$. Both and $\ensuremath{\Delta}{C}_{\mathrm{el}}$ monotonously decrease with increasing $x$. The specific heat scales approximately power law, $\ensuremath{\Delta}{C}_{\mathrm{el}}\ensuremath{\propto}{T}_{c}^{\ensuremath{\beta}}$,...
The quinary members of the complex boride series Sc2FeRu5–xIrxB2 were synthesized by arc melting elements and characterized powder single-crystal X-ray diffraction as well metallographic energy-dispersive analyses. use a 4d/5d mixture allows distinguishing these with methods, thus enabling study site preference its influence on magnetic properties.The measurements reveal several changes ordering within series: from antiferromagnetism (Sc2FeRu5B2) to ferromagnetism (Sc2FeRuIr4B2) finally...
A core–shell zeolite composite consisting of a single-crystal FAU-type (zeolite X) as the core and LTA-type A) shell has been synthesized. The growth studied using scanning electron microscopy (SEM), transmission (TEM) single crystal X-ray diffraction. Cross-sections for SEM TEM studies were prepared by argon ion cross-section polishing (CP) focused beam (FIB), respectively. results show that crystals grew epitaxially uniformly on X with well-defined orientation relationships. Three possible...