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Relationship Between Structure and Magnetic Behaviour in ZnO-Based Systems electronic resource by Clara Guglieri Rodríguez.

By: Guglieri Rodríguez, Clara [author.]Contributor(s): SpringerLink (Online service)Material type: TextTextSeries: Springer Theses, Recognizing Outstanding Ph.D. ResearchPublication details: Cham : Springer International Publishing : Imprint: Springer, 2015Description: XIV, 146 p. 104 illus., 52 illus. in color. online resourceContent type: text Media type: computer Carrier type: online resourceISBN: 9783319188874Subject(s): physics | Magnetism | Magnetic materials | Semiconductors | Surfaces (Physics) | Interfaces (Physical sciences) | Thin films | Quantum computers | Spintronics | Materials -- Surfaces | Physics | Magnetism, Magnetic Materials | Surfaces and Interfaces, Thin Films | Quantum Information Technology, Spintronics | Semiconductors | Surface and Interface Science, Thin FilmsDDC classification: 538 LOC classification: QC750-766QC764.5-766Online resources: Click here to access online
Contents:
Introduction -- Synthesis and In-House Characterization -- XAS and XMCD Spectroscopies -- Zinc K-Edge X-Ray Absorption Study -- Zinc K-Edge XMCD Study -- Soft X-Ray XAS and XMCD Study -- Summary and Conclusions -- Appendices -- Bibliography.
In: Springer eBooksSummary: This work studies the magnetic behavior of ZnO nanoparticles capped with different organic molecules and showing room-temperature ferromagnetism (RTFM). Of particular significance is the combination of element-specific X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) techniques, which demonstrates the intrinsic occurrence of RTFM in these systems and indicates that it is not related to the 3-D states of the metallic cation but is relayed along the conduction band of the semiconductor. The discovery of room-temperature ferromagnetism (RTFM) in semiconductors holds great promise in future spintronics technologies.   Further results presented here include O K-edge XMCD studies, which demonstrate that the oxygen ions have a ferromagnetic response in these ZnO-based systems, providing the first direct support for claims regarding the appearance of oxygen ferromagnetism in oxide semiconductors at the nanoscale.
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Introduction -- Synthesis and In-House Characterization -- XAS and XMCD Spectroscopies -- Zinc K-Edge X-Ray Absorption Study -- Zinc K-Edge XMCD Study -- Soft X-Ray XAS and XMCD Study -- Summary and Conclusions -- Appendices -- Bibliography.

This work studies the magnetic behavior of ZnO nanoparticles capped with different organic molecules and showing room-temperature ferromagnetism (RTFM). Of particular significance is the combination of element-specific X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) techniques, which demonstrates the intrinsic occurrence of RTFM in these systems and indicates that it is not related to the 3-D states of the metallic cation but is relayed along the conduction band of the semiconductor. The discovery of room-temperature ferromagnetism (RTFM) in semiconductors holds great promise in future spintronics technologies.   Further results presented here include O K-edge XMCD studies, which demonstrate that the oxygen ions have a ferromagnetic response in these ZnO-based systems, providing the first direct support for claims regarding the appearance of oxygen ferromagnetism in oxide semiconductors at the nanoscale.

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