The origin of ferromagnetism in ni-doped zno and sno2

I. Felner*, R. Herber, Somobrata Acharya, V. P.S. Awana

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We present a detailed study of the ferromagnetism in nano-Ni-doped SnO 2 and ZnO. It is shown that the ferromagnetic behavior is not an intrinsic property of the systems but rather associated with the presence of nNi particles in both matrices. The ferromagnetic transition of all Ni-doped samples is at 631(2) K, the same as the TC value for bulk Ni and nano-Ni powder. The saturation moments of the nano-Ni-doped samples scale with the Ni concentration and are much lower than that of pure Ni. This is due to the large surface area of nano-Ni particles which are partially oxidized due to nano-NiO. 119Sn Mössbauer spectroscopy studies on Sn 0.96Ni0.04O2 do not show any transferred hyperfine field on the Sn nuclei, confirming that the magnetic properties stem from a different phase.

Original languageEnglish
Pages (from-to)125-134
Number of pages10
JournalModern Physics Letters B
Volume24
Issue number2
DOIs
StatePublished - 20 Jan 2010

Keywords

  • Dilute magnetic semiconductors
  • Ferromagnetism
  • Nano-particles

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