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    Revealing a room temperature ferromagnetism in cadmium oxide nanoparticles: An experimental and first-principles study

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    Type
    Article
    Authors
    Bououdina, Mohamed
    Dakhel, A
    El-Hilo, : Mohammad
    Anjum, Dalaver H. cc
    Kanoun, Mohammed Benali
    Goumri-Said, Souraya
    KAUST Department
    Advanced Nanofabrication, Imaging and Characterization Core Lab
    Electron Microscopy
    Date
    2015
    Permanent link to this record
    http://hdl.handle.net/10754/347342
    
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    Abstract
    We obtain a single cadmium oxide phase from powder synthesized by a thermal decomposition method of cadmium acetate dehydrate. The yielded powder is annealed in air, vacuum, and H2 gas in order to create point defects. Magnetization-field curves reveal the appearance of diamagnetic behavior with a ferromagnetic component for all the powders. Powder annealing under vacuum and H2 atmosphere leads to a saturation magnetization 1.15 memu g-1 and 1.2 memu g-1 respectively with an increase by 45% and 16% compared to the one annealed in air. We show that annealing in vacuum produces mainly oxygen vacancies while annealing in H2 gas creates mainly Cd vacancy leading to room temperature ferromagnetic (RTFM) component together with known diamagnetic properties. Ab initio calculations performed on the CdO nanoparticles show that the magnetism is governed by polarized hybrid states of the Cd d and O p orbitals together with the vacancy. © The Royal Society of Chemistry 2015.
    Citation
    Revealing a room temperature ferromagnetism in cadmium oxide nanoparticles: An experimental and first-principles study 2015 RSC Adv.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    RSC Adv.
    DOI
    10.1039/C5RA03069B
    Additional Links
    http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA03069B
    ae974a485f413a2113503eed53cd6c53
    10.1039/C5RA03069B
    Scopus Count
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    Articles; Imaging and Characterization Core Lab

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