Room-Temperature Ferromagnetism in Co-Doped In2O3 Nanocrystals

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• 作者：Xiuqing Meng ; Liming Tang ; Jingbo Li
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：October 21, 2010
• 年：2010
• 卷：114
• 期：41
• 页码：17569-17573
• 全文大小：263K
• 年卷期：v.114,no.41(October 21, 2010)
• ISSN：1932-7455

文摘

Co-doped In₂O₃ nanocrystals showing room-temperature ferromagnetism have been successfully prepared by a simple sol−gel synthesis route. The sample displays a clear ferromagnetism behavior above 300 K. Phase and structure analyses reveal that the nanocrystals are crystallized with Co ions substituted for In ions in the In₂O₃ matrix, and no trace of secondary phases or clusters is detected. The experimental results are explained theoretically by first-principles calculations based on density functional theory, which indicate that the native ferromagnetic behavior of Co-doped In₂O₃ could be mainly ascribed to the strong d−d coupling of the magnetic ions.