Switching of magnetic moments of nanoparticles by surface acoustic waves

Tejada, J.; Chudnovsky, Eugene M.; Zarzuela, Ricardo; Statuto, Nahuel; Rosa, Jaume Calvo-de la; Santos, P. V.; Hernández-Mínguez, A.

doi:10.1209/0295-5075/118/37005

Cited by 18 publications

(13 citation statements)

References 30 publications

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“…Although magnetoelastic interaction is well-known, magnetoacoustics has only been investigated quite recently [8,55,56]. Since then, strain-induced magentization dynamics of nanoparticles excited specifically by Rayleigh waves, has gained strong interesst [57,58]. These efforts are driven by the potential of strain-induced dynamics, i.e., energy efficiency, mode selectivity and the ability to tailor the excitation to nanosize dimensions.…”

Section: Strain Control In Functional Materialsmentioning

confidence: 99%

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

et al. 2019

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We demonstrate full control of acoustic and thermal periodic deformations at solid surfaces down to sub-nanosecond time scales and few-micrometer length scales via independent variation of the temporal and spatial phase of two optical transient grating (TG) excitations. For this purpose, we introduce an experimental setup that exerts control of the spatial phase of subsequent time-delayed TG excitations depending on their polarization state. Specific exemplary coherent control cases are discussed theoretically and corresponding experimental data are presented in which time-resolved x-ray reflectivity measures the spatiotemporal surface distortion of nanolayered heterostructures. Finally, we discuss examples where the application of our method may enable the control of functional material properties via tailored spatiotemporal strain fields.

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Section: Strain Control In Functional Materialsmentioning

confidence: 99%

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

et al. 2019

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“…The surface acoustic, Rayleigh-type, wave is additionally interesting in this context because of the circular trajectory of particle displacement, which suggests a small Barnett field [124,125]. Surface acoustic waves in this context become akin to localized sources of microwave magnetic field [126,127]. There is also ongoing work towards coupling individual spins in defect centres, such as the nitrogen vacancy in diamond, to local strain.…”

Section: Torque Measurements Against the Backdrop Of Ongoing Advancesmentioning

confidence: 99%

Recent advances in mechanical torque studies of small-scale magnetism

Losby

Sauer

Freeman

2018

J. Phys. D: Appl. Phys.

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There is a storied scientific history in the role of mechanical instruments for the measurement of fundamental physical interactions. Among these include the detection of magnetic torques via a displacement of a compliant mechanical sensor as a result of angular momentum transfer. Modern nanofabrication methods have enabled the coupling of mechanical structures to single, miniature magnetic specimens. This has allowed for strikingly sensitive detection of magnetic hysteresis and other quasi-static effects, as well as spin resonances, in materials confined to nanoscale geometries. The extraordinary sensitivities achieved in mechanical transduction through recent breakthroughs in cavity optomechanics, where a high-finesse optical cavity is used for readout of motion, are now being harnessed for torque magnetometry. In this article, we review the recent progress in mechanical detection of magnetic torques, highlight current applications, and speculate on possible future developments in the technology and science. Guidelines for designing and implementing the measurements are also included. Acknowledgements 21 Appendix: Designer's guide 22 A feel for the numbers 22 Underlying scaling behaviour as a function of torque sensor/specimen linear size 22 Readout sensitivity 23 Low finesse interferometer 23 High finesse optical cavity 24 References 25 arXiv:1806.06288v1 [cond-mat.mes-hall]

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“…Therefore, acoustic energy transferred from the SAW to a magnetic device has been found to produce many interesting results within the field of magnetism and spintronics. To name few, a SAW can assist the switching in ferromagnetic films 8 or nano-elements 9 , 10 , reduce the energy required for magnetic recording 11 or even decrease the energy dissipation in spin-transfer-torque random access memories 12 . SAWs can also assist the domain wall motion 13 , 14 and there is a proposal to use SAWs to control the movement of magnetic domain walls (DWs) 15 .…”

Section: Introductionmentioning

confidence: 99%

Large asymmetry in the magnetoresistance loops of ferromagnetic nanostrips induced by Surface Acoustic Waves

Castilla

Muñoz

Sinusía

et al. 2021

Sci Rep

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In this work we show that Surface Acoustic Waves (SAW) can induce a very large asymmetry in the magnetoresistance loop of an adjacent ferromagnetic nanostrip, making it look as if it had exchange bias. The Surface Acoustic Wave induces a DC voltage in the ferromagnetic nanostrip. For measurements at constant current, this DC voltage makes the AMR loop asymmetric. In a series of different electrical experiments, we disentangle two different contributions to the induced DC voltage. One of them is independent on the external magnetic field and it is likely due to the acoustoelectric effect. A second contribution depends on the external magnetic field and it is a rectified voltage induced in the piezoelectric substrate as a response to the magnetization dynamics in the magnetostrictive nanostrip. The large asymmetry in the magnetoresistance loop reported in this work is a manifestation of an effective transfer of energy from the SAW to the magnetization dynamics, a mechanism that has been very recently appointed as a possible mean to harvest energy from a heat source.

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Switching of magnetic moments of nanoparticles by surface acoustic waves

Cited by 18 publications

References 30 publications

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

Recent advances in mechanical torque studies of small-scale magnetism

Large asymmetry in the magnetoresistance loops of ferromagnetic nanostrips induced by Surface Acoustic Waves

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