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NiO thin films fabr...
NiO thin films fabricated using spray-pyrolysis technique : structural and optical characterization and ultrafast charge dynamics studies
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- Das, Lakshmi (författare)
- Umeå universitet,Institutionen för fysik
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- Canto-Aguilar, Esdras J. (författare)
- Umeå universitet,Institutionen för fysik
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- Tapani, Tlek (författare)
- Umeå universitet,Institutionen för fysik
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- Lin, Haifeng (författare)
- Umeå universitet,Institutionen för fysik
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- Bhuvanendran, Hinduja (författare)
- Umeå universitet,Institutionen för fysik
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- Boulanger, Nicolas (författare)
- Umeå universitet,Institutionen för fysik
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- Salh, Roushdey (författare)
- Umeå universitet,Institutionen för fysik
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- Gracia-Espino, Eduardo (författare)
- Umeå universitet,Institutionen för fysik
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- Maccaferri, Nicolò, Dr. 1988- (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- Institute of Physics Publishing (IOPP), 2024
- 2024
- Engelska.
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Ingår i: Journal of Physics D. - : Institute of Physics Publishing (IOPP). - 0022-3727 .- 1361-6463. ; 57:38
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Nickel (II) oxide, NiO, is a wide band gap Mott insulator characterized by strong Coulomb repulsion between d-electrons and displays antiferromagnetic order at room temperature. NiO has gained attention in recent years as a very promising candidate for applications in a broad set of areas, including chemistry and metallurgy to spintronics and energy harvesting. Here, we report on the fabrication of polycrystalline NiO using spray-pyrolysis technique, which is a deposition technique able to produce quite uniform films of pure and crystalline materials without the need of high vacuum or inert atmospheres. The composition and structure of the NiO thin films were then studied using x-ray diffraction, and atomic force and scanning electron microscopies (SEM). The phononic and magnonic properties of the NiO thin films were also studied via Raman spectroscopy, and the ultrafast electron dynamics by using optical pump probe spectroscopy. We found that the NiO samples display the same phonon and magnon excitations expected for single crystal NiO at room temperature, and that electron dynamics in our system is like those of previously reported NiO mono- and polycrystalline systems synthesized using different techniques. These results prove that spray-pyrolysis can be used as affordable and large-scale fabrication technique to synthesize strongly correlated materials for a large set of applications.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- materials structure characterization
- nickel oxide
- polycrystalline thin film
- spray-pyrolysis
- ultrafast spectroscopy
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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