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The emerging field of magnonics uses spin waves and their quanta, magnons, to implement wave-based computing on the micro- and nanoscale. Multifrequency magnon networks would allow for parallel data processing within single logic elements, whereas this is not the case with conventional transistor-based electronic logic. However, a lack of experimentally proven solutions to efficiently combine and separate magnons of different frequencies has impeded the intensive use of this concept. Herein, the experimental realization of a spin-wave demultiplexer enabling frequency-dependent separation of magnonic signals in the gigahertz range is demonstrated. The device is based on 2D magnon trans- port in the form of spin-wave beams in unpatterned magnetic films. The intrinsic frequency dependence of the beam direction is exploited to realize a passive functioning obviating an external control and additional power consumption. This approach paves the way to magnonic multiplexing circuits enabling simultaneous information transport and processing.
Low damping magnetic properties and perpendicular magnetic anisotropy in the Heusler alloy Fe1.5CoGe
(2019)
We present a study of the dynamic magnetic properties of TiN-buffered epitaxial thin films of the Heusler alloy Fe1.5CoGe. Thickness series annealed at different temperatures are prepared and the magnetic damping is measured, a lowest value of α = 2.18 × 10−3 is obtained. The perpendicular magnetic anisotropy properties in Fe1.5CoGe/MgO are also characterized. The evolution of the interfacial perpendicular anisotropy constant K⊥S with the annealing temperature is shown and compared with the widely used CoFeB/MgO interface. A large volume contribution to the perpendicular anisotropy of (4.3 ± 0.5) × 105 J/m3 is also found, in contrast with vanishing bulk contribution in common Co- and Fe-based Heusler alloys.
Annual Report 2016
(2017)
Annual Report 2017
(2017)
Annual Report 2015
(2016)
Annual Report, Jahrbuch AG Magnetismus
Annual Report 2014
(2015)
Annual Report, Jahrbuch AG Magnetismus
Annual Report 2013
(2014)
Annual Report, Jahrbuch AG Magnetismus
Annual Report 2012
(2013)
Annual Report, Jahrbuch AG Magnetismus
Annual Report 2011
(2012)
Annual Report, Jahrbuch AG Magnetismus
Annual Report 2010
(2011)
Annual Report, Jahrbuch AG Magnetismus