Magneto-optical imaging of elastic strain-controlled magnetization reorientation

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2012
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Brandlmaier, Andreas
Brasse, Mattias
Geprägs, Stephan
Weiler, Mathias
Gross, Rudolf
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The European Physical Journal B. Springer. 2012, 85(4), 124. ISSN 1434-6028. eISSN 1434-6036. Available under: doi: 10.1140/epjb/e2012-20675-4
Zusammenfassung

We study strain-controlled magnetization-reorientation processes in nickel thin film/piezoelectric actuator hybrid structures. To obtain a consistent picture of the connection between magnetic microstructure and magnetoresistance, we correlate simultaneously measured spatially resolved magneto-optical Kerr effect imaging and integral magnetotransport measurements at room temperature. Our results show that the magnetization predominantly reorients by coherent rotation as a function of the voltage applied to the hybrid, except for a narrow region around the coercive field for which the magnetization reorientation evolves via domain effects. This demonstrates that both magnetic-field and strain-driven magnetization reversal can be modeled in terms of a macrospin model.

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ISO 690BRANDLMAIER, Andreas, Mattias BRASSE, Stephan GEPRÄGS, Mathias WEILER, Rudolf GROSS, Sebastian T. B. GOENNENWEIN, 2012. Magneto-optical imaging of elastic strain-controlled magnetization reorientation. In: The European Physical Journal B. Springer. 2012, 85(4), 124. ISSN 1434-6028. eISSN 1434-6036. Available under: doi: 10.1140/epjb/e2012-20675-4
BibTex
@article{Brandlmaier2012Magne-52509,
  year={2012},
  doi={10.1140/epjb/e2012-20675-4},
  title={Magneto-optical imaging of elastic strain-controlled magnetization reorientation},
  number={4},
  volume={85},
  issn={1434-6028},
  journal={The European Physical Journal B},
  author={Brandlmaier, Andreas and Brasse, Mattias and Geprägs, Stephan and Weiler, Mathias and Gross, Rudolf and Goennenwein, Sebastian T. B.},
  note={Article Number: 124}
}
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