Control of spin configuration in half-metallic La0.7Sr0.3MnO3 nano-structures

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2011
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Rhensius, Jan
Vaz, Carlos
Bisig, André
Heidler, Jakoba
Locatelli, Andrea
Niño, Miguel
Weigand, Markus
Méchin, Laurence
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Applied Physics Letters. 2011, 99(6), 062508. ISSN 0003-6951. Available under: doi: 10.1063/1.3623480
Zusammenfassung

We investigate the interplay between the governing magnetic energy terms in patterned La0.7Sr0.3MnO3 (LSMO) elements by direct high-resolution x-ray magnetic microscopy as a function of temperature and geometrical parameters. We show that the magnetic configurations evolve from multidomain to flux-closure states (favored by the shape anisotropy) with decreasing element size, with a thickness-dependent crossover at the micrometer scale. The flux-closure states are stable against thermal excitations up to near the Curie temperature. Our results demonstrate control of the spin state in LSMO elements by judicious choice of the geometry, which is key for spintronics applications requiring high spin-polarizations and robust magnetic states.

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530 Physik
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Curie temperature, lanthanum compounds, magnetic anisotropy, magnetic domains, magnetic flux, nanomagnetics, nanopatterning, nanostructured materials, strontium compounds, X-ray microscopy
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ISO 690RHENSIUS, Jan, Carlos VAZ, André BISIG, Sebastian SCHWEITZER, Jakoba HEIDLER, Helmut KÖRNER, Andrea LOCATELLI, Miguel NIÑO, Markus WEIGAND, Laurence MÉCHIN, Fabien GAUCHER, Eberhard GOERING, Laura HEYDERMAN, Mathias KLÄUI, 2011. Control of spin configuration in half-metallic La0.7Sr0.3MnO3 nano-structures. In: Applied Physics Letters. 2011, 99(6), 062508. ISSN 0003-6951. Available under: doi: 10.1063/1.3623480
BibTex
@article{Rhensius2011Contr-19797,
  year={2011},
  doi={10.1063/1.3623480},
  title={Control of spin configuration in half-metallic La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> nano-structures},
  number={6},
  volume={99},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Rhensius, Jan and Vaz, Carlos and Bisig, André and Schweitzer, Sebastian and Heidler, Jakoba and Körner, Helmut and Locatelli, Andrea and Niño, Miguel and Weigand, Markus and Méchin, Laurence and Gaucher, Fabien and Goering, Eberhard and Heyderman, Laura and Kläui, Mathias},
  note={Article Number: 062508}
}
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