Coherent elastic excitation of spin waves
WebJan 28, 2016 · Here, we experimentally demonstrate efficient excitation and directional propagation of coherent spin waves generated by pure spin current. We show that this … WebWe model the injection of elastic waves into a ferromagnetic film (F) by a nonmagnetic transducer (N). We compare the configurations in which the magnetization is normal and parallel to the wave propagation. The lack of axial symmetry in the former results in the emergence of evanescent interface states.
Coherent elastic excitation of spin waves
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WebWe report on the direct observation of spin wave and elastic wave emission from magnetic domain walls in ferromagnetic thin films. Driven by alternating homogeneous magnetic fields the magnetic domain walls act as coherent magnetisation wave sources. Directional and low damped elastic waves below and above the ferromagnetic resonance are excited. WebLongitudinal and surface acoustic waves are measured in BK-7 glass, diamond, and Bi4Ge3O12; in the latter material, the excitation of a coherent optical phonon mode is also observed.
WebApr 13, 2024 · The Higgs boson decays too rapidly to be spotted and was a particle with no spin. During the excitation of the Higgs field by the wave phase, both the Higgs bosons … WebJul 14, 2024 · Using the experimental results and equations of motion for spins, we show that the mechanism of the spin excitation above and below the Morin point relies on a magnetic-dipole interaction of the THz magnetic field with spins, and the mechanism implies that the efficiency of the coupling is proportional to the time derivative of the magnetic field.
WebHere we study the excitation and propagation of MEWs in a ferromagnet by a non-magnetic transducer that injects elastic waves into the ferromagnet. MEWs are generated at the … WebOct 23, 2024 · By using time-resolved SWaT, we reveal the excitation dynamics of magnetoelastic waves through coherent-energy transfer between optically-excited pure-elastic waves and spin waves via magnetoelastic coupling.
WebAug 26, 2024 · The excitation, detection, and utilization of coherent and non-coherent spin waves on various modes in V(TCNE) x is demonstrated and show that the angular momentum carried by microwave-excited coherent spin waves in a V(TCNE) x film can be transferred into an adjacent Pt layer via spin pumping and detected using the inverse … trade schools that accept gi bill near meWebform of bulk acoustic waves (BAWs), and spin waves, and ac-cordingly the formation of hybrid magneto-elastic waves has been studied extensively already in the 1950s and 1960s. As theoretically suggested by Kittel [5] the excitation of BAWs by spin waves [6] and conversely the excitation of spin waves by BAWs has been demonstrated [7]. trade schools that dont require a diplomaWebDec 3, 2024 · The simulations show that, despite high Gilbert damping characteristic of cobalt ferrite, the injected elastic waves with frequencies around the resonance frequency of coherent magnetization precession in unstrained CoFe2O4film efficiently generate spin waves in this ferrimagnetic insulator. trade schools tallahassee flWebSep 20, 2024 · Unidirectional propagation of spin waves is key to the realization of magnonic logic devices. Here, the authors experimentally demonstrate excitations of unidirectional exchange spin waves by a nanoscale magnetic grating fabricated on an ultrathin yttrium iron garnet film. The authors explain and model the nearly perfect … trade schools that offer weldingWebJan 1, 2024 · Studies of the coupling of elastic waves with other wave excitations, including spin waves, in nanostructures are experiencing a revival, which is mostly due to the … thery avocat douaiWebMar 21, 2024 · In the emerging field of magnonics, spin waves are foreseen as signal carriers for future spintronic information processing and communication devices, owing to … trade schools tacomaWebFrequency and wavenumber selective excitation of spin waves through coherent energy transfer from elastic waves . Abstract . Using spin-wave tomography (SWaT), we have investigated the excitation and the propagation dynamics of optically excited magnetoelastic waves, i.e., hybridized modes of spin waves and elastic waves, in a … the ryback twins