A versatile platform for magnetostriction measurements in thin films

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2016
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Pernpeintner, Matthias
Holländer, Rasmus B.
Gross, Rudolf
Huebl, Hans
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Journal of Applied Physics. 2016, 119(9), 093901. ISSN 0021-8979. eISSN 1089-7550. Available under: doi: 10.1063/1.4942531
Zusammenfassung

We present a versatile nanomechanical sensing platform for the investigation of magnetostriction in thin films. It is based on a doubly clamped silicon nitride nanobeam resonator covered with a thin magnetostrictive film. Changing the magnetization direction within the film plane by an applied magnetic field generates a magnetoelastic stress and thus changes the resonance frequency of the nanobeam. A measurement of the resulting resonance frequency shift, e.g., by optical interferometry, allows to quantitatively determine the magnetostriction constants of the thin film. In a proof-of-principle experiment, we determine the magnetostriction constants of a 10 nm thick polycrystalline cobaltfilm, showing very good agreement with literature values. The presented technique aims, in particular, for the precise measurement of magnetostriction in a variety of (conducting and insulating) thin films, which can be deposited by, e.g., electron beam deposition, thermal evaporation, or sputtering.

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ISO 690PERNPEINTNER, Matthias, Rasmus B. HOLLÄNDER, Maximilian SEITNER, Eva M. WEIG, Rudolf GROSS, Sebastian T. B. GOENNENWEIN, Hans HUEBL, 2016. A versatile platform for magnetostriction measurements in thin films. In: Journal of Applied Physics. 2016, 119(9), 093901. ISSN 0021-8979. eISSN 1089-7550. Available under: doi: 10.1063/1.4942531
BibTex
@article{Pernpeintner2016versa-33666,
  year={2016},
  doi={10.1063/1.4942531},
  title={A versatile platform for magnetostriction measurements in thin films},
  number={9},
  volume={119},
  issn={0021-8979},
  journal={Journal of Applied Physics},
  author={Pernpeintner, Matthias and Holländer, Rasmus B. and Seitner, Maximilian and Weig, Eva M. and Gross, Rudolf and Goennenwein, Sebastian T. B. and Huebl, Hans},
  note={Article Number: 093901}
}
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