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Synthesis, structure and magnetic properties ofβ-MnO 2 nanorods

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Abstract

We present synthesis, structure and magnetic properties of structurally well-ordered single-crystalline β-MnO2nanorods of 50–100 nm diameter and several µm length. Thorough structural characterization shows that the basic β-MnO2material is covered by a thin surface layer (2.5 nm) of α-Mn2O3phase with a reduced Mn valence that adds its own magnetic signal to the total magnetization of the β-MnO2nanorods. The relatively complicated temperature-dependent magnetism of the nanorods can be explained in terms of a superposition of bulk magnetic properties of spatially segregated β-MnO2and α-Mn2O3constituent phases and the soft ferromagnetism of the thin interface layer between these two phases.

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Acknowledgment

This work was supported by the Frontier Research Laboratory Program at the Korea Basic Science Institute.

Author information

Correspondence to J. Dolinšek.

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Cite this article

Kim, H., Lee, J., Kim, Y. et al. Synthesis, structure and magnetic properties ofβ-MnO 2 nanorods. Nanoscale Res Lett 2, 81 (2007) doi:10.1007/s11671-006-9034-4

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Keywords

  • Self-assembled nanorods
  • Manganese oxides
  • Nanoscale magnetism