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Annual Report 2017

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Contents

2 Personnel

2.1 Members of the group
2.2 Visiting scientists, postdoctoral fellows and exchange students
2.3 Guest seminars
2.4 Visits of group members at other laboratories
2.5 Group member photo gallery

3 Methods

3.1 Brillouin light scattering spectroscopy (BLS)
3.2 Microwave techniques
3.3 Magneto-optic Kerr effect magnetometry and microscopy (MOKE)
3.4 Molecular beam epitaxy (MBE)

4 Reports on Experimental Results

A. Magnon Gases, Condensates and Supercurrents

4.1 Long-distance supercurrent transport in a room-temperature Bose-Einstein magnon condensate

4.2 From kinetic instability to Bose-Einstein condensation and magnon supercurrent

4.3 Electrical detection of internally pumped magnons

4.4 Control of temperature-induced magnon supercurrent by magnon population

4.5 Wavelength-dependent transformation of dipole-exchange magnon modes in obliquely magnetized YIG films

4.6 Temperature dependent relaxation of dipole-exchange magnons in YIG film

B. Nano- and Micro-Magnonics

4.7 Spin-pinning conditions in nano-scale YIG waveguides

4.8 Magnon dispersion in a magnetic bi-layer system

4.9 Identification of backscattering-immune spin-wave modes

4.10 Excitation and investigation of spin-wave beams

4.11 Spin-wave mode conversion in a thermal gradient

4.12 Frequency-division multiplexing in magnonic logic networks based on caustic-like spin-wave beams

C. Magnon Spintronics

4.13 Optimized spintronic terahertz emitters based on epitaxially grown Fe/Pt layer structures

4.14 Large spin Hall angle of single-crystalline Pt obtained from spin pumping experiments

4.15 Enhancement of the spin pumping effect by two-magnon confluence process in YIG-Pt bilayers

4.16 Dzyaloshinskii-Moriya interaction in CoFeB|Pt and CoFeB|W thin films

4.17 Spin pumping through a Fe3O4 nanooxide at the Fe/Pt interface

D. New Materials and Heusler Compounds

4.18 Low damping and low magnetization CoFeAlB alloy for spin transfer torque switching

4.19 Magneto-plasmonic interaction in YIG/Au hybrid nanostructures

4.20 Evolution of the interfacial perpendicular magnetic anisotropy constant of the Co2FeAl/MgO interface upon annealing

6 Conferences, Workshops, Schools, Seminars

6.1 Invited talks
6.2 Contributed talks and posters
6.3 Annual group retreat
6.4 Other meetings and trade fairs

 

This annual report may also be downloaded as a single file: Annual Report 2017