Magneto-optical properties of Ce3+ and Tb3+-doped silico-phosphate sol-gel thin films

Stefan, C.R.; Elisa, M.; Vasiliu, Ileana Cristina; Sava, Bogdan Alexandru; Boroica, Lucica; Sofronie, M.; Ţolea, Felicia; Enculescu, Monica; Kuncser, V.; Beldiceanu, Anca; Volceanov, Adrian; Eftimie, Mihai

doi:10.1016/j.apsusc.2018.04.067

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…The estimation of the energy band gap-based oxide ion polarizability,

is based on the molar volume, V M , band gap, E g , the total polarizability of cations,

and the number of oxygen atoms in the molar oxide glass composition,

, reported in [ 14 , 17 ]. In the case of Te-5 glass,

, and, based on the measured n D value (see Table 1 ), it was found

Refractive index-based oxide ion polarizability and energy band gap-based oxide ion polarizability values, in the case of Te-5 glass, are lower by comparison with high content TeO 2 glasses [ 12 , 15 ] (see Table 2 ), due to the low tellurium oxide content from the vitreous material.…”

Section: Resultsmentioning

confidence: 99%

“…Table 2, besides the E g value that has already been discussed, presents other optical properties [12,15] (see Table 2), due to the low tellurium oxide content from the vitreous material.…”

Section: Optical Properties and Related Electron Structure Parametersmentioning

confidence: 91%

“…It is worth mentioning the previous results of the authors related to magnetic and magneto-optical properties of Dy 3+ /Tb 3+ /La 3+ alumina-phosphate vitreous systems applied as bulk Faraday rotators [ 9 , 10 , 11 ] as well as to the rare-earth-doped silico-phosphate sol–gel thin films for magneto-optical applications [ 12 ]. A very recent work of the authors also referred to thermal, structural, mechanical, magnetic and magneto-optical properties of Bi 2 O 3 and PbO-doped boron-phosphate glasses [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

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A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications

et al. 2020

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This work investigates the structural, magnetic and magneto-optical properties of a new zinc phosphate-tellurite glass belonging to the 45ZnO-10Al2O3-40P2O5-5TeO2 system. The glass was prepared by a wet method of processing the starting reagents followed by suitable melting–stirring–quenching–annealing steps. Specific parameters such as density, average molecular mass, molar volume, oxygen packaging density, refractive index, molar refractivity, electronic polarizability, reflection loss, optical transmission, band gap and optical basicity have been reported together with thermal, magnetic and magneto-optical characteristics. Absorption bands appear in the blue and red visible region, while over 600 nm the glass becomes more transparent. FTIR and Raman spectra evidenced phosphate-tellurite vibration modes proving the P2O5 and TeO2 network forming role. Magnetic measurements reveal the diamagnetic character of the Te-doped glass with an additional weak ferromagnetic signal, specific to diluted ferromagnetic oxides. Positive Faraday rotation angle with monotonous decreasing value at increasing wavelength was evidenced from magneto-optical measurements. The final product is a composite material comprising of a non-crystalline vitreous phase and Te-based nanoclusters accompanied by oxygen vacancies. The metallic-like Te colloids are responsible for the dark reddish color of the glass whereas the accompanying oxygen vacancies might be responsible for the weak ferromagnetic signal persisting up to room temperature.

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“…The estimation of the energy band gap-based oxide ion polarizability,

is based on the molar volume, V M , band gap, E g , the total polarizability of cations,

and the number of oxygen atoms in the molar oxide glass composition,

, reported in [ 14 , 17 ]. In the case of Te-5 glass,

, and, based on the measured n D value (see Table 1 ), it was found

Section: Resultsmentioning

confidence: 99%

“…Table 2, besides the E g value that has already been discussed, presents other optical properties [12,15] (see Table 2), due to the low tellurium oxide content from the vitreous material.…”

Section: Optical Properties and Related Electron Structure Parametersmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications

et al. 2020

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“…Compared with the Tb 3+ ion, the Ce 3+ ion has a larger effective excitation wavelength. Although it has weaker magnetic properties, the magneto-optical material containing Ce 3+ has magneto-optical properties nearly as strong as that containing Tb 3+ . − For instance, the Verdet constants of CeAlO 3 crystal at wavelengths of 532, 635, and 1064 nm are approximately double that of the TGG crystal . Moreover, a magneto-optical crystal containing Ce 3+ has high transmittance in 1500–2300 nm, which makes up for application needs other than the magneto-optical crystal containing Tb 3+ .…”

Section: Introductionmentioning

confidence: 99%

Structure and Magnetic and Magneto-Optical Properties of a New Cubic Ce₃Sc₂Ga₃O₁₂ Garnet Crystal with Heavy Ce³⁺ Concentration

Liu,

Wang,

Zhang

et al. 2024

Crystal Growth & Design

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Based on the thermal stability analysis by density functional theory and the crystal phase optimization by tolerance factor, the crystal structure was designed. So, a new cubic Ce 3 Sc 2 Ga 3 O 12 (CSGG) garnet material with a high Ce 3+ concentration was synthesized. The centimeter-scale CSGG crystal was grown by the Czochralski method. CSGG exhibits fine magneto-optical properties, which are attributed to the stable valence and high concentration of rare-earth Ce 3+ ions. Compared with commercial Tb 3 Ga 5 O 12 (TGG), CSGG is also paramagnetic, but its magneto-optical properties are better. The Verdet constants of CSGG in 532, 635, 1064, and 1550 nm are −380.0, −258.8, −47.5, and −22.4 rad/T•m, respectively, which are from 1.2 to 2.0 times that of TGG. Moreover, the CSGG crystal has high transmittance in 1500−2300 nm to make up for the poor transmittance of TGG crystal in this band. Also, considering its low raw material cost, the CSGG crystal presents promising application potential. It could be qualified as an essential material for magneto-optical isolators, circulators, and switches within the visible to mid-infrared band.

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“…Due to its properties such as low electrical resistivity, high optical transmittance [12,21], and the big reflectivity in the infrared region, it can be used as, although anode in lithium-based batteries, a conductive electrode of thin layers of photovoltaic cells. The SnO 2 thin layers have been extensively prepared by employing different procedures like dual-beam pulsed laser deposition (DB-PLD) [22], spray pyrolysis [23], magnetron sputtering [24], molecular beam epitaxy (MBE) [25], and sol-gel method [26], which will be used with the spin coating to prepare our thin films; the reason this was chosen was because of its several advantages: its simplicity, low cost, and its ability to generally obtain uniform films with good adherence and reproducibility [27]. Until now, impurities for doping SnO 2 thin films have been applied by other researchers such as fluorine (F), antimony (Sb), copper (Cu), nickel (Ni), cobalt (Co), aluminum (Al), and Indium (In) [28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Nickel and Aluminum-Codoped SnO2 Thin Films for Optoelectronic Applications

Bouabdalli

Jouad

Garmim

et al. 2021

International Journal of Photoenergy

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In this study, the coating technique was used to prepare thin layers of nickel and aluminum-codoped tin oxide (SnO2: Ni; Al). This study is aimed at exploring the influence of aluminum (Al) dopant on the structural, optical, and electrical properties of the elaborated films. X-ray diffraction (XRD) studies discovered that all deposited films (Ni-doped and Al-Ni-codoped SnO2) were polycrystalline with tetragonal (quadratic) structure and exhibited [110] preferential orientation. The optical measurements exposed that all prepared films have presented good transparency. The transmittance of Ni-Al-codoped SnO2 thin films in the visible and near-infrared regions varied between 80% and 90%; this was dependent on the concentration of dopant. The band gap was determined via the equation related to the absorption coefficient. It was deduced that the optical band gap values of thin films gradually decreased from 4.084 eV to 3.991 eV, as an effect of Al content. In addition, it was concluded that the thickness values of the films pass from 571.374 nm to 694.036 nm as an effect of Al content. Moreover, the extinction coefficient decreases with the wavelength in the UV region and then varies slightly towards longer wavelengths. Moreover, the electrical resistivity was determined using the four-point probe; it was determined that the electrical resistivity decreases from 1.35 × 10 3 Ω · cm to 0.14 × 10 3 Ω · cm with aluminum concentration increasing from 0 at. % to 7 at. %. The elaborated films of SnO2 codoped with Ni and Al present were highly transparent; therefore, these thin layers look promising in the use of the window layer in PV solar cells.

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Magneto-optical properties of Ce3+ and Tb3+-doped silico-phosphate sol-gel thin films

Cited by 6 publications

References 19 publications

A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications

A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications

Structure and Magnetic and Magneto-Optical Properties of a New Cubic Ce₃Sc₂Ga₃O₁₂ Garnet Crystal with Heavy Ce³⁺ Concentration

Preparation and Characterization of Nickel and Aluminum-Codoped SnO2 Thin Films for Optoelectronic Applications

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Magneto-optical properties of Ce3+ and Tb3+-doped silico-phosphate sol-gel thin films

Cited by 6 publications

References 19 publications

A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications

A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications

Structure and Magnetic and Magneto-Optical Properties of a New Cubic Ce3Sc2Ga3O12 Garnet Crystal with Heavy Ce3+ Concentration

Preparation and Characterization of Nickel and Aluminum-Codoped SnO2 Thin Films for Optoelectronic Applications

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Structure and Magnetic and Magneto-Optical Properties of a New Cubic Ce₃Sc₂Ga₃O₁₂ Garnet Crystal with Heavy Ce³⁺ Concentration