Role of valence-band Co 3d states on ferromagnetism in Zn 1-xCoxO nanorods

J. W. Chiou, H. M. Tsai, C. W. Pao, K. P. Krishna Kumar, J. H. Chen, D. C. Ling, F. Z. Chien, W. F. Pong, M. H. Tsai, J. J. Wu, M. H. Yang, S. C. Liu, I. H. Hong, C. H. Chen, H. J. Lin, J. F. Lee

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18 Citations (Scopus)

Abstract

This work investigates the electronic and ferromagnetic properties of Zn1-x Cox O nanorods using x-ray absorption, x-ray magnetic circular dichroism, and scanning photoelectron microscopy methods. The magnetic moment of Co ions in Zn1-x Cox O nanorods is found greatly reduced relative to that of the Co metal. The intensities of valence-band features near the valence-band maximum/Fermi level (EF) of ferromagnetic nanorods are substantially larger than those of weaker ferromagnetic nanorods, suggesting that the occupation of near- EF valence-band Co 3d states is important in determining the ferromagnetic behavior in Zn1-x Cox O nanorods.

Original languageEnglish
Article number062103
JournalApplied Physics Letters
Volume90
Issue number6
DOIs
Publication statusPublished - 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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