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Room Temperature Ferromagnetism in Lithium-Doped ZnO.

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Title: Room Temperature Ferromagnetism in Lithium-Doped ZnO.
Authors: Ran, C. J.1, Xu, X. G.2, Yang, H. L.3, Wang, Y. K.4, Miao, J.3, Jiang, Y.3
Source: IEEE Transactions on Magnetics. Nov2012, Vol. 48 Issue 11, p3422-3425. 4p.
Subjects: Ferromagnetism, Lithium, Zinc oxide, Polycrystals, Photoluminescence, Sol-gel processes, Particle size distribution
Abstract: Here we report our study on the lithium-doped ZnO films prepared by sol-gel method. The films are polycrystalline wurtzite structure and the average particle size is about 50 nm. All the films are ferromagnetic, and the film with Li content of 8 at. % has the largest saturation magnetization of about 55 memu/g. The photoluminescence spectra show that the films have weak emission near ultraviolet region and strong emission in visible regions. The Li atoms in Zn sites can induce Zn vacancies and a low acceptor level in the energy gap, which are required for ferromagnetism. The first-principles calculations demonstrate that the ferromagnetism in the Li-doped ZnO originates from the induced magnetic moment of oxygen atoms in the nearest neighbor sites to Li-Zn vacancy pair. [ABSTRACT FROM AUTHOR]
Copyright of IEEE Transactions on Magnetics is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Room Temperature Ferromagnetism in Lithium-Doped ZnO.
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  Data: <searchLink fieldCode="JN" term="%22IEEE+Transactions+on+Magnetics%22">IEEE Transactions on Magnetics</searchLink>. Nov2012, Vol. 48 Issue 11, p3422-3425. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Ferromagnetism%22">Ferromagnetism</searchLink><br /><searchLink fieldCode="DE" term="%22Lithium%22">Lithium</searchLink><br /><searchLink fieldCode="DE" term="%22Zinc+oxide%22">Zinc oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Polycrystals%22">Polycrystals</searchLink><br /><searchLink fieldCode="DE" term="%22Photoluminescence%22">Photoluminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Sol-gel+processes%22">Sol-gel processes</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+size+distribution%22">Particle size distribution</searchLink>
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  Data: Here we report our study on the lithium-doped ZnO films prepared by sol-gel method. The films are polycrystalline wurtzite structure and the average particle size is about 50 nm. All the films are ferromagnetic, and the film with Li content of 8 at. % has the largest saturation magnetization of about 55 memu/g. The photoluminescence spectra show that the films have weak emission near ultraviolet region and strong emission in visible regions. The Li atoms in Zn sites can induce Zn vacancies and a low acceptor level in the energy gap, which are required for ferromagnetism. The first-principles calculations demonstrate that the ferromagnetism in the Li-doped ZnO originates from the induced magnetic moment of oxygen atoms in the nearest neighbor sites to Li-Zn vacancy pair. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of IEEE Transactions on Magnetics is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1109/TMAG.2012.2196415
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      – Code: eng
        Text: English
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        PageCount: 4
        StartPage: 3422
    Subjects:
      – SubjectFull: Ferromagnetism
        Type: general
      – SubjectFull: Lithium
        Type: general
      – SubjectFull: Zinc oxide
        Type: general
      – SubjectFull: Polycrystals
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      – SubjectFull: Photoluminescence
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      – SubjectFull: Sol-gel processes
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      – SubjectFull: Particle size distribution
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      – TitleFull: Room Temperature Ferromagnetism in Lithium-Doped ZnO.
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              Text: Nov2012
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