Ferromagnetism in N-Doped In₂O₃ Films Prepared by Thermal Oxidation

Abstract:

Two series of N-doped In₂O₃ films were prepared by annealing the sputtered InN films in air at different temperatures and for different time. The corresponding structural and magnetic properties are studied. An apparent transformation from the wurtzite InN to the cubic bixbyite In₂O₃ is observed with increasing the annealing temperature. Room temperature d⁰ ferromagnetism is detected, which is found to be closely related with the annealing conditions. We think that the ferromagnetism is derived from the N-doping which substitute the positions of the oxygen atoms in the In₂O₃ lattice, and an indirect ferromagnetic coupling can be established between the doped N atoms via the hybridized O 2p and In 5p/4d orbitals.

• Periodical: Advanced Materials Research (Volume 763)
• Pages: 102-106
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.763.102
• Online since: September 2013
• Authors: Peng Fei Xing, Shao Hua Sun
• Keywords: d⁰ Ferromagnetism, InN Films, N-Doped In₂O₃ Films, Thermal Oxidation

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