Magnetic microstructure and magnetotransport in Co2FeAl Heusler compound thin films

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2011
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Weiler, Mathias
Czeschka, Franz D.
Brandlmaier, Andreas
Imort, Inga-Mareen
Reiss, Günter
Thomas, Andy
Woltersdorf, Georg
Gross, Rudolf
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We correlate simultaneously recorded magnetotransport and spatially resolved magneto optical Kerr effect (MOKE) data in Co2FeAl Heusler compound thin films micropatterned into Hall bars. Room temperature MOKE images reveal the nucleation and propagation of domains in an externally applied magnetic field and are used to extract a macrospin corresponding to the mean magnetization direction in the Hall bar. The anisotropic magnetoresistance calculated using this macrospin is in excellent agreement with magnetoresistance measurements. This suggests that the magnetotransport in Heusler compounds can be adequately simulated using simple macrospin models, while the magnetoresistance contribution due to domain walls is of negligible importance.

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ISO 690WEILER, Mathias, Franz D. CZESCHKA, Andreas BRANDLMAIER, Inga-Mareen IMORT, Günter REISS, Andy THOMAS, Georg WOLTERSDORF, Rudolf GROSS, Sebastian T. B. GOENNENWEIN, 2011. Magnetic microstructure and magnetotransport in Co2FeAl Heusler compound thin films. In: Applied Physics Letters. American Institute of Physics (AIP). 2011, 98(4), 042501. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.3544559
BibTex
@article{Weiler2011Magne-52536,
  year={2011},
  doi={10.1063/1.3544559},
  title={Magnetic microstructure and magnetotransport in Co<sub>2</sub>FeAl Heusler compound thin films},
  number={4},
  volume={98},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Weiler, Mathias and Czeschka, Franz D. and Brandlmaier, Andreas and Imort, Inga-Mareen and Reiss, Günter and Thomas, Andy and Woltersdorf, Georg and Gross, Rudolf and Goennenwein, Sebastian T. B.},
  note={Article Number: 042501}
}
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