Non-reciprocal Pumping of Surface Acoustic Waves by Spin Wave Resonance
Kei Yamamoto, Weichao Yu, Tao Yu, Jorge Puebla, Mingran Xu, Sadamichi Maekawa, G. Bauer
Abstract
We predict that surface acoustic waves are generated preferentially in one direction in a heterostructure of a thin magnetic film on a non-magnetic substrate. The non-reciprocity arises from magneto-elastic coupling and magneto-rotation coupling, the former being dominant for YIG/GGG heterostructures. For YIG films thinner than about 100 nm, the surface acoustic wave amplitude is nearly unidirectional at certain angles of the in-plane equilibrium magnetisation. We compute the full magnetic field dependence of the effect for a selected device.
Topics & Concepts
Condensed matter physicsReciprocity (cultural anthropology)Materials scienceMagnetic fieldAmplitudeCoupling (piping)MagnetoHeterojunctionSurface acoustic waveAcoustic waveSurface waveResonance (particle physics)Spin waveMagnetizationFree surfacePhysicsOpticsFerromagnetismMagnetMechanicsAtomic physicsSocial psychologyQuantum mechanicsMetallurgyPsychologyMagnetic properties of thin filmsMagneto-Optical Properties and ApplicationsCharacterization and Applications of Magnetic Nanoparticles