Title:	Europium incorporation dynamics within NiO films deposited by sol-gel spin coating: Experimental and theoretical studies
Authors:	Goumri-Said, Souraya Khan, Wilayat Boubaker, Karemt Ben Mahmoud Turgut, Güven Sönmez, Erdal Minár, Jan Bououdina, Mohamed Kanoun, Mohammed Benali
Citation:	GOUMRI-SAID, S. ., KHAN, W. ., BOUBAKER, K. B. M. ., TURGUT, G. ., SÖNMEZ, E. ., MINÁR, J. ., BOUOUDINA, M. ., KANOUN, M. B. . Europium incorporation dynamics within NiO films deposited by sol-gel spin coating: Experimental and theoretical studies. Materials research bulletin, 2019, roč. 118, č. OCT 2019, s. [1-7]. ISSN 0025-5408.
Issue Date:	2019
Publisher:	Elsevier
Document type:	článek article
URI:	2-s2.0-85068370555 http://hdl.handle.net/11025/39566
ISSN:	0025-5408
Keywords in different language:	NiO;Sol-gel spin coating;Eu incorporation;DFT;Spintronics
Abstract in different language:	Europium doped NiO thin films were grown onto glass substrates via sol-gel spin coating. The evolution of crystal structure, surface topography, and optical properties of NiO was investigated as a function of Eu doping concentration. AFM observations and XRD analysis revealed that NiO:Eu films composed of nano-sized grains exhibit a polycrystalline cubic bunsenite structure with (200) preferential orientation. Optical study showed that the optical band gap of doped NiO films initially increased with low Eu incorporation ratio then decreased with higher Eu content. However, the Urbach energy increased gradually with Eu doping level. First principle calculations were performed to elucidate the changes on electronic, magnetic and optical properties of NiO due to Eu doping. The incorporation of Eu within NiO host lattice induced a strong hybridization between Eu-f and Ni-d states resulting in important changes of bulk magnetization.
Rights:	Plný text není přístupný. © Elsevier
Appears in Collections:	Články / Articles (RAM) OBD

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