ISSN 0253-2778

CN 34-1054/N

Open AccessOpen Access JUSTC

Magnetic properties of Ni1-xMnxO diluted magnetic semiconductor

Cite this:
https://doi.org/10.3969/j.issn.0253-2778.2014.08.006
  • Received Date: 15 May 2014
  • Rev Recd Date: 08 June 2014
  • Publish Date: 31 August 2014
  • The microstructural and magnetic properties of Ni1-xMnxO (001≤x≤005) thin films prepared by pulsed laser deposition (PLD) were studied by combining X-ray absorption near edge structure (XANES) spectroscopy, superconducting quantum interference device (SQUID) and first-principles calculations. XANES results at Mn K-edge show that at the low Mn doping level of x≤003, the Mn ions in the mixed oxidation valence state (+2/+3) are incorporated substitutionally into the NiO host, while at higher doping level of x>003 Mn2O3-like impurity phase is formed. Magnetization measurements indicate that the saturation magnetic moment of Ni1-xMnxO film increases from 03 to 045 μB/Mn as the Mn content rises from 001 to 003. It is proposed that interactions between Mn3+ ions mediated by Ni vacancies exhibit ferromagnetic coupling, while interactions between Mn2+ ions exhibit antiferromagnetic coupling through superexchange interaction.
    The microstructural and magnetic properties of Ni1-xMnxO (001≤x≤005) thin films prepared by pulsed laser deposition (PLD) were studied by combining X-ray absorption near edge structure (XANES) spectroscopy, superconducting quantum interference device (SQUID) and first-principles calculations. XANES results at Mn K-edge show that at the low Mn doping level of x≤003, the Mn ions in the mixed oxidation valence state (+2/+3) are incorporated substitutionally into the NiO host, while at higher doping level of x>003 Mn2O3-like impurity phase is formed. Magnetization measurements indicate that the saturation magnetic moment of Ni1-xMnxO film increases from 03 to 045 μB/Mn as the Mn content rises from 001 to 003. It is proposed that interactions between Mn3+ ions mediated by Ni vacancies exhibit ferromagnetic coupling, while interactions between Mn2+ ions exhibit antiferromagnetic coupling through superexchange interaction.
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