Volume 118, Number 3, May 2017
|Number of page(s)||7|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||13 July 2017|
Switching of magnetic moments of nanoparticles by surface acoustic waves
1 Departament de Física de la Matèria Condensada, Facultat de Física, Universitat de Barcelona Martí i Franquès 1, 08028 Barcelona, Spain
2 Department of Physics and Astronomy, Lehman College of the City University of New York 250 Bedford Park Boulevard West, Bronx, NY 10468-1589, USA
3 Graduate School of the City University of New York - 365 Fifth Ave, New York, NY 10016, USA
4 Department of Physics and Astronomy, University of California - Los Angeles, CA 90095, USA
5 Paul-Drude-Institut für Festkörpelektronik - Hausvogteiplatz 5-7, 10117 Berlin, Germany
Received: 27 March 2017
Accepted: 18 June 2017
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.
PACS: 72.55.+s – Magnetoacoustic effects / 75.60.Jk – Magnetization reversal mechanisms / 77.65.Dq – Acoustoelectric effects and surface acoustic waves (SAW) in piezoelectrics
© EPLA, 2017
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