Mechanism of ferromagnetism in non-magnetic ion-doped zinc oxides

Sun, Shih-Jye, Yu, Chang-Feng, Hsu, Hua-Shu, Chou, Hsiung, & Du, Aijun (2014) Mechanism of ferromagnetism in non-magnetic ion-doped zinc oxides. Physica Scripta, 89(1).

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Zinc oxide (ZnO) that contains non-magnetic ionic dopants, such as nitrogen (N)-doped zinc oxide (ZnO:N), has been observed to exhibit ferromagnetism. Ferromagnetism is proposed to arise from the Coulomb excitation in the localized states that is induced by the oxygen vacancy, V O. A model based on the Coulomb excitation that is associated with the electron–phonon interaction theoretically explains the ferromagnetic mechanism of ZnO:N. This study reveals that the ferromagnetism will be induced by either deep localized states with a small V O concentration or shallow localized states with a high V O concentration. Additionally, electron–phonon coupling either suppresses the ferromagnetism that is induced by the deep donor states of V O or enhances the ferromagnetism that is induced by the shallow donor states of V O.

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ID Code: 66447
Item Type: Journal Article
Refereed: Yes
DOI: 10.1088/0031-8949/89/01/015807
ISSN: 1402-4896
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 The Royal Swedish Academy of Sciences
Deposited On: 22 Jan 2014 01:31
Last Modified: 28 Feb 2014 01:38

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