Influence of transition metal doping on the structural, optical, and magnetic properties of TiO2 films deposited on Si substrates by a sol-gel process.
TLDR
It is found that the magnetizations of the TM-doped TiO2 films decrease with increasing dopant content, which is related to electric disorder due to the ART.Abstract:
Transition metal (TM)-doped TiO2 films (TM = Co, Ni, and Fe) were deposited on Si(100) substrates by a sol–gel method. With the same dopant content, Co dopants catalyze the anatase-to-rutile transformation (ART) more obviously than Ni and Fe doping. This is attributed to the different strain energy induced by the different dopants. The optical properties of TM-doped TiO2 films were studied with spectroscopic ellipsometry data. With increasing dopant content, the optical band gap (EOBG) shifts to lower energy. With the same dopant content, the EOBG of Co-doped TiO2 film is the smallest and that of Fe-doped TiO2 film is the largest. The results are related to electric disorder due to the ART. Ferromagnetic behaviors were clearly observed for TM-doped TiO2 films except the undoped TiO2 film which is weakly magnetic. Additionally, it is found that the magnetizations of the TM-doped TiO2 films decrease with increasing dopant content.read more
Citations
More filters
Journal ArticleDOI
Enhancing Lithium and Sodium Storage Properties of TiO2(B) Nanobelts by Doping with Nickel and Zinc
Denis P. Opra,Sergey V. Gnedenkov,Sergey L. Sinebryukhov,Andrey V. Gerasimenko,Albert M. Ziatdinov,Alexander A. Sokolov,A. B. Podgorbunsky,Alexander Yu. Ustinov,Valery G. Kuryavyi,Vitaly Yu. Mayorov,I. A. Tkachenko,V. I. Sergienko +11 more
TL;DR: In this article, zinc-and nickel-doped mesoporous TiO2(B) nanobelts were synthesized using a hydrothermal technique, and they exhibited improved electrochemical performance.
Journal ArticleDOI
Dopant concentration dependent magnetism of Cu-doped TiO 2 nanocrystals
B. Anitha,M. Abdul Khadar +1 more
TL;DR: In this article, XRD analysis using Rietveld refinement confirmed anatase phase with a small percentage of rutile content for undoped and Cu-doped nanocrystals.
Journal ArticleDOI
Investigation on the structural, multiferroic and magnetoelectric properties of BaTi1-xNixO3 ceramics
TL;DR: In this article, the influence of Ni doping on the structural, electrical, magnetic and magnetoelectric properties of BaTiO3 (BTO) ceramics was reported.
Journal ArticleDOI
Transition-Metal Ion-Doped Flower-Like Titania Nanospheres as Nonlight-Driven Catalysts for Organic Dye Degradation with Enhanced Performances.
TL;DR: Titania has recently been identified as a new and effective nonlight-driven catalyst for degradation of organic pollutant with the use of H2O2 as an oxidant; however, either relatively low surface area or lack of diversity in chemical composition largely limits its catalytic performance.
Journal ArticleDOI
Influence of iron doping on the photocatalytic activity of nanocrystalline TiO2 particles fabricated by ultrasound method for enhanced degradation of organic dye
Mohamed Saber Lassoued,Abdelmajid Lassoued,Mohammed S. M. Abdelbaky,Salah Ammar,Abdellatif Gadri,Abdelhamid Ben Salah,Santiago García-Granda +6 more
TL;DR: In this paper, the synthesis and characterization of Fe doped TiO2 composite with iron concentration varying from 0 to 7% as a photocatalyst in the photodegradation of methylene orange on UV-Vis light irradiation in a closed reactor has been carried out.
References
More filters
Journal ArticleDOI
Zener Model Description of Ferromagnetism in Zinc-Blende Magnetic Semiconductors
TL;DR: Zener's model of ferromagnetism, originally proposed for transition metals in 1950, can explain T(C) of Ga(1-)(x)Mn(x)As and that of its II-VI counterpart Zn(1)-Mn (x)Te and is used to predict materials with T (C) exceeding room temperature, an important step toward semiconductor electronics that use both charge and spin.
Journal ArticleDOI
Donor impurity band exchange in dilute ferromagnetic oxides.
TL;DR: It is proposed thatferromagnetic exchange here, and in dilute ferromagnetic nitrides, is mediated by shallow donor electrons that form bound magnetic polarons, which overlap to create a spin-split impurity band.
Journal ArticleDOI
Behavior of the Electronic Dielectric Constant in Covalent and Ionic Materials
S. H. Wemple,M. DiDomenico +1 more
TL;DR: In this article, a single effectiveoscillator fit was used to analyze refractive-index dispersion data below the interband absorption edge in more than 100 widely different solids and liquids.
Journal ArticleDOI
Considerations on Double Exchange
TL;DR: In this paper, it was shown that while the states of large total spin have both the highest and lowest energies, their average energy is the same as those of low total spin.