Room-Temperature Decay and Light Reactivation of High-Tc Ferromagnetism in an Oxide-Diluted Magnetic Semiconductor

详细信息    查看全文

• 作者：Dengyu Pan ; Jianguo Wan ; Guoliang Xu ; Liya Lv ; Yujie Wu ; Han Min ; Junming Liu ; Guanghou Wang
• 刊名：Journal of the American Chemical Society
• 出版年：2006
• 出版时间：October 4, 2006
• 年：2006
• 卷：128
• 期：39
• 页码：12608 - 12609
• 全文大小：93K
• 年卷期：v.128,no.39(October 4, 2006)
• ISSN：1520-5126

文摘

We present a novel route for manipulation of the ferromagnetic order in Co-doped TiO₂ using UV laser irradiation. The ferromagnetic order of the nanocrystal films decays with aging in air at room temperature, which can be reactivated and enhanced by UV irradiation, whereas the coercive force reduces with irradiation time. Photoinduced trapped electrons were suggested to induce the ferromagnetic order. We believe that light manipulation is a general method for tuning the magnetic properties of oxide-based diluted magnetic semiconductors, which can find practical applications in future integrated magneto-optical nanoelectronics.