Correlation between magnetic spin structure and the three-dimensional geometry in chemically synthesized nanoscale magnetite rings

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2008
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Eltschka, Matthias
Kasama, Takeshi
Cervera-Gontard, Lionel
Dunin-Borkowski, Rafal E.
Luo, Feng
Heyderman, Laura J.
Jia, Chun-Jiang
Sun, Ling-Dong
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Applied Physics Letters. 2008, 92(22), 222508. Available under: doi: 10.1063/1.2936989
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The correlation between magnetic spin structure and geometry in nanoscale chemically synthesized Fe3O4 rings has been investigated by transmission electron microscopy. We find primarily the flux closure vortex states but in rings with thickness variations, an effective stray field occurs. Using tomography, we determine the complete three-dimensional geometries of thicker rings. A direct correlation between the geometry and the magnetization which points out of plane in the thickest parts of the ring yielding an intermediate magnetic state between the vortex state and the tube state is found. The interaction between exchange coupled rings leads to antiparallel vortex states and extended onion states.

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ISO 690ELTSCHKA, Matthias, Mathias KLÄUI, Ulrich RÜDIGER, Takeshi KASAMA, Lionel CERVERA-GONTARD, Rafal E. DUNIN-BORKOWSKI, Feng LUO, Laura J. HEYDERMAN, Chun-Jiang JIA, Ling-Dong SUN, Chun-Hua YAN, 2008. Correlation between magnetic spin structure and the three-dimensional geometry in chemically synthesized nanoscale magnetite rings. In: Applied Physics Letters. 2008, 92(22), 222508. Available under: doi: 10.1063/1.2936989
BibTex
@article{Eltschka2008Corre-9073,
  year={2008},
  doi={10.1063/1.2936989},
  title={Correlation between magnetic spin structure and the three-dimensional geometry in chemically synthesized nanoscale magnetite rings},
  number={22},
  volume={92},
  journal={Applied Physics Letters},
  author={Eltschka, Matthias and Kläui, Mathias and Rüdiger, Ulrich and Kasama, Takeshi and Cervera-Gontard, Lionel and Dunin-Borkowski, Rafal E. and Luo, Feng and Heyderman, Laura J. and Jia, Chun-Jiang and Sun, Ling-Dong and Yan, Chun-Hua},
  note={Article Number: 222508}
}
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