A5062319011- Magnetic properties of thin films
- Quantum and electron transport phenomena
- Physics of Superconductivity and Magnetism
- Magneto-Optical Properties and Applications
- Theoretical and Computational Physics
- Magnetic Properties and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Memory and Neural Computing
- Photorefractive and Nonlinear Optics
- Metallic Glasses and Amorphous Alloys
- Magnetic Properties of Alloys
- ZnO doping and properties
University of Kaiserslautern
2016-2021
University of Glasgow
2019
RIKEN Center for Emergent Matter Science
2019
University of Oxford
2019
University of Colorado Colorado Springs
2019
Aristotle University of Thessaloniki
2017
We present a study of fully epitaxial Fe/Pt bilayers by means ferromagnetic resonance (FMR) techniques. The dependence the field ${H}_{\mathrm{FMR}}$, Gilbert damping parameter $\ensuremath{\alpha}$, and FMR linewidth on Pt thickness is presented compared with reference layers. Since spin pumping extremely sensitive to interface properties, corresponding large importance. By studying systems, existence an almost perfectly single-crystalline ordered ensured. measured effects, such as resonant...
Magnon systems used in quantum devices require low damping if coherence is to be maintained. The ferrimagnetic electrical insulator yttrium iron garnet (YIG) has magnon at room temperature and a strong candidate host microwave excitations future devices. Monocrystalline YIG films are typically grown on gadolinium gallium (GGG) substrates. In this work, comparative experiments made waveguides with without GGG substrates indicate that the material plays significant role increasing...
Low-energy consumption enabled by charge-free information transport, which is free from Joule heating, and the ability to process phase-encoded data through use of nanometer-sized interference devices operating at GHz THz frequencies are just a few benefits spin-wave-based technologies. Moreover, when approaching cryogenic temperatures, quantum phenomena in spin-wave systems pave path towards processing. In view these applications, lifetime magnons---spin-wave quanta---is high relevance for...
The spin-pumping mechanism is probed through a tunnelling MgO interlayer in Fe/Pt bilayers. We show by ferromagnetic resonance technique and experiments that spin currents can tunnel the for thickness up to 2~{nm} produce significant voltages Pt layer. electrical detection of furthermore reveals critical role rectification shunting effects on generated voltages. non zero current transport few monolayers an insulating might initiate further studies very thin oxides experiments.
We report on the determination of spin Hall angle in ultra-clean, defect-reduced epitaxial Pt films. By applying vector network analyzer ferromagnetic resonance spectroscopy to a series single crystalline Fe (12 nm) /Pt (tPt) bilayers we determine real part mixing conductance (4.4 ± 0.2) × 1019 m−2 and reveal very small diffusion length (1.1 0.1) nm film. investigate pumping ISHE stripe microstucture excited by microwave coplanar waveguide antenna. using their different angular dependencies,...
Magnon Bose-Einstein Condensates (BECs) and supercurrents are coherent quantum phenomena, which appear on a macroscopic scale in parametrically populated solid state spinsystems. One of the most fascinating attractive features these processes is possibility magnon condensation supercurrent excitation even at room temperature. At same time, valuable information about BEC state, such as its lifetime, formation threshold, coherency, provided by experiments various temperatures. Here, we use...
We have explored the impact of elevated growth and annealing temperatures on local interfacial structure thin Fe(12 nm)/Pt(10 nm) spintronic bilayers, epitaxially grown MgO (100), their correlation to magnetization reversal dynamics. Electron-beam evaporation subsequent at 450 °C causes significant roughening MgO/Fe interface with irregular steps multilevel (100) surface terraces. Consequently, threading dislocations emerging step edges propagated in Fe layer terminated Fe/Pt interface,...