Relationship between structure and magnetic behaviour in ZnO-based systems [electronic resource] / Clara Guglieri Rodríguez.

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Relationship between structure and magnetic behaviour in ZnO-based systems [electronic resource] / Clara Guglieri Rodríguez.

9783319188874 electronic book
3319188879 electronic book
9783319188867

Cham, Switzerland : Springer, [2015]

English

1 online resource.

TK454.4.M3

621.34

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.

"Doctoral thesis accepted by the University of Zaragoza, Spain."

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