Switching of Magnetic Moments of Nanoparticles by Surface Acoustic Waves

Abstract

We report evidence of the magnetization reversal in nanoparticles by surface acoustic waves (SAWs). The experimental system consists of isolated magnetite nanoparticles dispersed on a piezoelectric substrate. Magnetic relaxation from a saturated state becomes significantly enhanced in the presence of the SAW at a constant temperature of the substrate. The dependence of the relaxation on SAW power and frequency has been investigated. The effect is explained by the effective ac magnetic field generated by the SAW in the nanoparticles.

arXiv commentAccepted in Europhysics Letters

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• Generation of a localized microwave magnetic field by coherent phonons in a ferromagnetic nanograting
• Applications of Nanomagnets as Dynamical Systems
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• Unidirectional planar Hall voltages induced by surface acoustic waves in ferromagnetic thin films
• Full spatiotemporal control of laser-excited periodic surface deformations
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• Solid-state magnetic traps and lattices
• GHz sample excitation at the ALBA-PEEM