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We show that a coupling exists between nitrogen vacancy (NV) centers in diamond in proximity to magnetoelastic spin waves generated by a voltage driven surface acoustic wave. Experimental measurements show the presence of coupling driven by both dipolar fields induced by a spin wave-like excitation and off-resonant coupling of the NV energy levels driven by acoustically driven ferromagnetic resonance dynamics. A model is proposed based on chiral coupling of the NV centers to the stray field that originates from a propagating magnetoelastic wave in a thin magnet, and model predictions are validated by experimental observations. Understanding of the coupling enables a direct measurement of the stray field polarization, which in turn provides a detailed picture of the resonantly coupled magnon–phonon interaction. [ABSTRACT FROM AUTHOR]

The resonant interaction between surface acoustic waves and ferromagnetic thin films, a phenomenon known as acoustically driven ferromagnetic resonance (ADFMR), provides a way to control magnetic resonance with purely voltage excitation. However, devices have historically been operated at harmonic frequencies, leading to large insertion losses. In this work, we demonstrate a harmonic-free drive of ADFMR devices where the strain reaches very high values, comparable to the saturation magnetostriction of the magnetic element. The acoustic energy transfer is highly efficient and reaches almost 99.9%. Furthermore, we report the presence of multiple absorption maxima across the range of applied magnetic fields, a property not previously observed in the literature. [ABSTRACT FROM AUTHOR]

This article describes a novel approach which allows for the mutual determination of a ferromagnetic thin film's static and dynamic magnetic behaviours in the presence of an external thermodynamic stimulus. Using a combination of polarized neutron reflectometry (PNR) and ferromagnetic resonance (FMR) techniques, it is shown that information such as magnetic depth profiles and magnetization dynamics can be obtained for a ferromagnetic film in both transient and static states in the presence of a hydrogen gas atmosphere. Presented here are the proposed scheme, the instrumentation concept and the first experimental results obtained from implementing a custom‐made PNR with an in situ FMR sample chamber on the PLATYPUS time‐of‐flight reflectometer beamline at the Australian Centre for Neutron Scattering (ANSTO). [ABSTRACT FROM AUTHOR]

The article offers information on Electric-field control of spin dynamics during magnetic phase transitions. It mentions an approach to manipulate the damping by using the large damping enhancement induced by the two-magnon scattering and a nonlocal spin relaxation process in which spin currents are resonantly transported from antiferromagnetic domains to ferromagnetic matrix in a mixed-phased metallic alloy FeRh.

The article focuses on different physical phenomena to enable a highly efficient excitation nitrogen-vacancy (NV) centers such as magnetoelastic drive of ferromagnetic resonance and NV-magnon coupling. It mentions combination of acoustics and magnonics that enables highly energy-efficient and local excitation of NV centers without need for any external radio frequency (RF) excitation. It also mentions superconducting quantum interference devices and spin-exchange relaxation-free magnetometers.