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Subnanosecond magnetization dynamics driven by strain waves

Published online by Cambridge University Press:  09 November 2018

Michael Foerster ,
Lucia Aballe ,
Joan Manel Hernàndez  and
Ferran Macià
Michael Foerster
Affiliation:
ALBA Synchrotron, Spain; mfoerster@cells.es
Lucia Aballe
Affiliation:
ALBA Synchrotron, Spain; laballe@cells.es
Joan Manel Hernàndez
Affiliation:
Department of Condensed Matter Physics, University of Barcelona, Spain; jm_hernandez@ub.edu
Ferran Macià
Affiliation:
Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Spain; fmacia@icmab.es
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Abstract

The magnetic properties of a magnetic material can be modified by elastic deformation—termed the magnetoelastic effect. This effect is considered an alternative approach to magnetic fields for the low-power control of magnetization states of nanostructures since it avoids charge currents that create heat dissipation. This article describes the effects of dynamic strain accompanying a surface acoustic wave on magnetic nano-elements. We use a technique based on stroboscopic x-ray microscopy to simultaneously image the evolution of both strain and magnetization at the nanometer length and picosecond time scales. The study shows that there is a delayed response of the magnetization to dynamic strain, adjustable by the magnetic properties of the material. The presented analysis provides insights into dynamic magnetoelastic coupling in nanostructures with implications for the design of strain-controlled nanodevices.

Keywords

magnetic propertiespiezoelectricnanoscalex-ray photoelectron spectroscopy (XPS)
Type
Materials for Strain-Mediated Magnetoelectric Systems
Information
MRS Bulletin , Volume 43 , Issue 11: Materials for Strain-Mediated Magnetoelectric Systems , November 2018 , pp. 854 - 859
Copyright
Copyright © Materials Research Society 2018 

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