Ferromagnetic Behavior and Magneto-Optical Properties of Semiconducting Co-Doped ZnO.
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| Title: | Ferromagnetic Behavior and Magneto-Optical Properties of Semiconducting Co-Doped ZnO. |
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| Authors: | Di Trolio, Antonio1 (AUTHOR) antonio.ditrolio@cnr.it, Testa, Alberto M.2 (AUTHOR) albertomaria.testa@mlib.ism.cnr.it, Amore Bonapasta, Aldo2 (AUTHOR) aldo.amore@mlib.ism.cnr.it |
| Source: | Nanomaterials (2079-4991). May2022, Vol. 12 Issue 9, p1525-1525. 22p. |
| Subjects: | Zinc oxide films, Oxygen vacancy, Magnetooptics, Semiconductors, Thin films |
| Abstract: | ZnO is a well-known semiconducting material showing a wide bandgap and an n-type intrinsic behavior of high interest in applications such as transparent electronics, piezoelectricity, optoelectronics, and photovoltaics. This semiconductor becomes even more attractive when doped with a few atomic percent of a transition metal. Indeed, e.g., the introduction of substitutional Co atoms in ZnO (ZCO) induces the appearance of room temperature ferromagnetism (RT-FM) and magneto-optical effects, making this material one of the most important representatives of so-called dilute magnetic semiconductors (DMSs). In the present review, we discuss the magnetic and magneto-optical properties of Co-doped ZnO thin films by considering also the significant improvements in the properties induced by post-growth irradiation with atomic hydrogen. We also show how all of these properties can be accounted for by a theoretical model based on the formation of Co-VO (oxygen vacancy) complexes and the concurrent presence of shallow donor defects, thus giving a sound support to this model to explain the RT-FM in ZCO DMSs. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | ZnO is a well-known semiconducting material showing a wide bandgap and an n-type intrinsic behavior of high interest in applications such as transparent electronics, piezoelectricity, optoelectronics, and photovoltaics. This semiconductor becomes even more attractive when doped with a few atomic percent of a transition metal. Indeed, e.g., the introduction of substitutional Co atoms in ZnO (ZCO) induces the appearance of room temperature ferromagnetism (RT-FM) and magneto-optical effects, making this material one of the most important representatives of so-called dilute magnetic semiconductors (DMSs). In the present review, we discuss the magnetic and magneto-optical properties of Co-doped ZnO thin films by considering also the significant improvements in the properties induced by post-growth irradiation with atomic hydrogen. We also show how all of these properties can be accounted for by a theoretical model based on the formation of Co-VO (oxygen vacancy) complexes and the concurrent presence of shallow donor defects, thus giving a sound support to this model to explain the RT-FM in ZCO DMSs. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20794991 |
| DOI: | 10.3390/nano12091525 |
