Fluorophosphate Glasses with High Terbium Content for Magneto-optical Applications

Bellanger, Brice; Ledemi, Yannick; Messaddeq, Younès

doi:10.1021/acs.jpcc.9b11696

Cited by 32 publications

(13 citation statements)

References 35 publications

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“…In particular, for the NIR region (at 1550 nm), MO materials are good options for applications in telecommunication systems. Among all the paramagnetic ions, Tb 3+ is one of the most attractive 1 , 13 , 18 . It has the electronic configuration 4f 8 → 4f 7 5d 8,9 , providing good paramagnetic behavior and among the highest magnetic moments (μ eff = 9.5–9.72) and susceptibilities (J = 6, g = 1.46) of all the rare earth ions 1 .…”

Section: Introductionmentioning

confidence: 99%

Magneto-optical borogermanate glasses and fibers containing Tb3+

Franco

Ledemi

Correr

et al. 2021

Sci Rep

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New glass compositions containing high concentrations of Tb3+ ions were developed aiming at the production of magneto-optical (MO) fibers. This work reports on the structural and MO properties of a new glass composition based on (100 − x)(41GeO2–25B2O3–4Al2O3–10Na2O–20BaO) − xTb4O7. Morphological analysis (HR-TEM) of the sample with the highest concentration of Tb3+ ions confirmed the homogeneous distribution of Tb3+ ions and the absence of nanoclusters. All the samples presented excellent thermal stability against crystallization (ΔT > 100 °C). An optical fiber was manufactured by a fiber drawing process. The UV–Vis spectra of the glasses showed Tb3+ electronic transitions and optical windows varying from 0.4 to 1.6 μm. The magneto-optical properties and the paramagnetic behaviors of the glasses were investigated using Faraday rotation experiments. The Verdet constant (VB) values were calculated at 500, 650, 880, 1050, 1330, and 1550 nm. The maximum VB values obtained at 650 and 1550 nm for the glass with x = 18 mol% were -128 and − 17.6 rad T−1 m−1, respectively. The VB values at 500 and 1550 nm for the optical fiber containing 8 mol% of Tb4O7 were − 110.2 and − 9.5 rad T−1 m−1, respectively, while the optical loss at around 880 nm was 6.4 dB m−1.

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Section: Introductionmentioning

confidence: 99%

Magneto-optical borogermanate glasses and fibers containing Tb3+

Franco

Ledemi

Correr

et al. 2021

Sci Rep

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“…In the present work, glass of the composition 35NaPO 3 − 15BaF 2 −50TbF 3 (mol %) reported in anterior work is used as a starting material due to its large solubility of RE. 33 The glass samples will be co-doped with three lanthanide trivalent ions, Pr, Dy, and Ho, by substituting for Tb concentrations from 0 to 100 at. % (i.e., Tb-free).…”

Section: ■ Introductionmentioning

confidence: 99%

Superexchange Interaction Influence on the Faraday Effect in Terbium Fluorophosphate Glasses by Co-doping with Praseodymium, Dysprosium, and Holmium

et al. 2021

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The superexchange interaction on the Faraday effect is investigated in fluorophosphate glasses following the composition (in mol %) 35NaPO3–15BaF2–0.5(100 – x)TbF3–xREF3) with the levels of substitution x = 0, 1, 2, 3, 4, 5, 10, 25, 50, and 100 where RE = Pr, Dy, and Ho. Compositional, thermal, and optical properties were characterized by electron probe micro-analysis, density, differential scanning calorimetry, UV–visible transmission, and Verdet constant measurements, respectively. A precise control of the elementary composition and substitution is reported. An increase of Verdet constant for a constant total lanthanide concentration is observed at low levels of substitution. For glass series co-doped with praseodymium, holmium, and dysprosium substitution, the maximal Verdet constant at 600 nm is respectively −84.2, −84.5, and −84.5 rad T–1 m–1, comparative to the Verdet constant of Tb singly doped glass of −81.9 rad T–1 m–1. To the best of our knowledge, it is the first report of this effect in glassy materials and the first study of Faraday effect in solid materials with such a broad range of RE substitution. The origin of this phenomenon and the link between the superexchange interaction and the Zeeman effect causing the Faraday effect are discussed.

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“…In particular, for the NIR region (at 1550 nm), MO materials are good options for applications in telecommunication systems. Among all the paramagnetic ions, Tb 3+ is one of the most attractive 1,13,18 . It has the electronic configuration 4f 8 → 4f 7 5d 8,9 , providing good paramagnetic behavior and among the highest magnetic moments (μeff = 9.5-9.72) and susceptibilities (J = 6, g = 1.46) of all the rare earth ions 1 .…”

Section: Introductionmentioning

confidence: 99%

Large Faraday effect and structural properties of heavily Tb3+-doped borogermanate glasses: a potential precursor of magneto-optical fibers

Franco

Ledemi

Correr

et al. 2021

Preprint

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New glass compositions containing high concentrations of Tb3+ ions were developed aiming at the production of magneto-optical (MO) fibers. This work reports on the structural and MO properties of a new glass composition based on (100-x)(41GeO2-25B2O3-4Al2O3-10Na2O-20BaO) – xTb4O7. Morphological analysis (HR-TEM) of the sample with the highest concentration of Tb3+ ions confirmed the homogeneous distribution of Tb3+ ions and the absence of nanoclusters. All the samples presented excellent thermal stability against crystallization (ΔT > 100 oC). An optical fiber was manufactured by a fiber drawing process. The UV-Vis spectra of the glasses showed Tb3+ electronic transitions and optical windows varying from 0.4 to 1.6 µm. The magneto-optical properties and the paramagnetic behaviors of the glasses were investigated using Faraday rotation experiments. The Verdet constant (VB) values were calculated at 500, 650, 880, 1050, 1330, and 1550 nm. The maximum VB values obtained at 650 and 1550 nm for the glass with x = 18 mol% were − 128 and − 17.6 rad T− 1 m− 1, respectively. The VB values at 500 and 1550 nm for the optical fiber containing 8 mol% of Tb4O7 were − 110.2 and − 9.5 rad T− 1 m− 1, respectively, while the optical loss at around 880 nm was 6.4 dB m− 1.

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Fluorophosphate Glasses with High Terbium Content for Magneto-optical Applications

Cited by 32 publications

References 35 publications

Magneto-optical borogermanate glasses and fibers containing Tb3+

Magneto-optical borogermanate glasses and fibers containing Tb3+

Superexchange Interaction Influence on the Faraday Effect in Terbium Fluorophosphate Glasses by Co-doping with Praseodymium, Dysprosium, and Holmium

Large Faraday effect and structural properties of heavily Tb3+-doped borogermanate glasses: a potential precursor of magneto-optical fibers

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