Effects of Ni concentration on structural, magnetic and optical properties of Ni-doped ZnO nanoparticles

Yang Liu, Hongbo Liu, Zhenguo Chen, Naveen Kadasala, Chenyi Mao, Yaxin Wang, Yongjun Zhang, Huilian Liu, Yanqing Liu, Jinghai Yang, Yongsheng Yan

Research output: Contribution to journalArticle

55 Scopus citations

Abstract

Ni-doped zinc oxide (Zn1-xNixO, 0 ≤ x ≤ 0.08) diluted magnetic semiconductors have been synthesized by the using a sol-gel method. Structural, magnetic and optical properties of the samples have been studied. The results of X-ray diffraction (XRD), transmission electron microscope (TEM) and X-ray absorption fine structure (XAFS) indicated that Ni ions were substitutionally incorporated into the crystal lattice of ZnO. With Ni concentration increasing up to 2 at.%, all diffraction peaks corresponded to wurtzite structure of ZnO, but for Zn0.97Ni0.03O, secondary phase of NiO emerged. Based on the results of X-ray photoelectron spectroscopy (XPS), Ni incorporated into the ZnO lattice as Ni2+. The produced samples showed good high-Tc (Curie temperature) ferromagnetism. The results of vibrating sample magnetometer (VSM) and photoluminescence (PL) showed that ferromagnetism (FM) of the Ni-doped ZnO nanoparticles originated from the presence of the O vacancy.

Original languageEnglish (US)
Pages (from-to)281-285
Number of pages5
JournalJournal of Alloys and Compounds
Volume604
DOIs
StatePublished - Aug 15 2014

Keywords

  • Diluted magnetic semiconductors
  • Magnetic properties
  • Sol-gel method
  • Structure

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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    Liu, Y., Liu, H., Chen, Z., Kadasala, N., Mao, C., Wang, Y., Zhang, Y., Liu, H., Liu, Y., Yang, J., & Yan, Y. (2014). Effects of Ni concentration on structural, magnetic and optical properties of Ni-doped ZnO nanoparticles. Journal of Alloys and Compounds, 604, 281-285. https://doi.org/10.1016/j.jallcom.2014.03.079