Trigonal LaF<sub>3</sub>: a novel SRS-active crystal

Каминский, А. А.; Lux, Oliver; Hanuza, J.; Rhee, H.; Eichler, Hans Joachim; Zhang, J; Tang, Dingyuan; Shen, Dongchao; Yoneda, Hitoki; Shirakawa, Akira

doi:10.1088/1054-660x/24/12/125401

Cited by 10 publications

(7 citation statements)

References 43 publications

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“…37, In passing, we note that MW-activated CVD also offer routes to forming essentially monoisotopic diamond; a 12 C SCD grown from an isotopically pure 12 CH4/H2 gas mixture, for example, will display significantly higher thermal conductivity than an equivalent diamond containing 12 C and 13 C in natural abundance. 79 Intriguingly, however, many prior studies have shown that adding trace amounts of N2 to the process gas mixture actually enhances the rate of diamond growth from MW-activated CH4/H2 gas mixtures. 49,[80][81][82][83][84][85][86][87][88] The presence of nitrogen in the process gas mixture also affects the surface morphology, encouraging the preferential formation of {100}-faceted surfaces in the case of polycrystalline diamond films (illustrated in Figure 8(d)-(f)) 49,80,89,90 and macroscopic stepbunching (as illustrated in Figure 11) in the case of SCD samples.…”

Section: Effects Of Adding Nitrogen To C/h Containing Gas Mixturesmentioning

confidence: 99%

Nitrogen in Diamond

et al. 2020

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Nitrogen is ubiquitous in both natural and laboratory-grown diamond, but the number and nature of the nitrogen-containing defects can have a profound effect on the diamond material and its properties. An ever-growing fraction of the supply of diamond appearing on the world market is now lab-grown. Here, we survey recent progress in two complementary diamond synthesis methodshigh pressure high temperature (HPHT) growth and chemical vapour deposition (CVD), how each is allowing ever more precise control of nitrogen incorporation in the resulting diamond, and how the diamond produced by either method can be further processed (e.g. by implantation and/or annealing) to achieve a particular outcome or property. The burgeoning availability of diamond samples grown under well-defined conditions has also enabled huge advances in the characterization and understanding of nitrogen-containing defects in diamondalone, and in association with vacancies, hydrogen and transition metal atoms. Amongst these, the negatively charged nitrogen-vacancy (NV −) defect in diamond is attracting particular current interest on account of the many new and exciting opportunities it offers for, e.g., quantum technologies, nanoscale magnetometry and biosensing. 2 Laboratory Based Synthesis of Diamond and Nitrogen-Containing Diamond 2.1 High Pressure High Temperature (HPHT) Methods. Nature was the inspiration for the HPHT method, by which diamond growth was demonstrated by Swedish company ASEA in 1953 (though not reported at that time) and subsequently by US company General Electric in 1955. 14 , 15 Most present-day HPHT synthesis exploits the temperature-gradient growth (TGG) method developed later in that decade. 16 However, it took many further years before the design and control of HPHT reactors yielded diamonds of

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Section: Effects Of Adding Nitrogen To C/h Containing Gas Mixturesmentioning

confidence: 99%

Nitrogen in Diamond

et al. 2020

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“…In addition, compounds like LuVO4 and YbVO4 have been found to be promising materials for self-Raman lasers [13].…”

Section: Introductionmentioning

confidence: 99%

Recent progress on the characterization of the high-pressure behaviour of AVO4 orthovanadates

Errandonea

Garg

2018

Progress in Materials Science

120

143

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AVO4 orthovanadates are materials of fundamental and technological importance due to the large variety of functional properties exhibited by them. These materials have potential applications such as scintillators, thermophosphors, photocatalysts, and cathodoluminescence materials among others. They are also used as laser-host crystals.Studies at high pressures and temperatures are helpful for understanding the physical properties of the solid state, in particular, the phase behaviour of AVO4 materials. For instance, they have contributed to the understanding of the macroscopic properties of orthovanadates in terms of microscopic mechanisms. A great progress has been made in the last decade towards the study of the pressure-effects on the structural, vibrational, and electronic properties of AVO4 compounds. Thanks to the combination of experimental and theoretical studies, novel metastable structures with interesting * Corresponding author, Email: daniel.errandonea@uv.es, Fax: (34) 96 3543146, Tel.: (34) 96 354 4475 physical properties have been discovered and the high-pressure structural sequence followed by AVO4 oxides has been understood. In this article, we will review highpressure studies carried out on the phase behaviour of different AVO4 compounds. The studied materials include rare-earth orthovanadates and other compounds; for example, BiVO4, FeVO4, CrVO4, and InVO4. In particular, we will focus on discussing the results obtained by different research groups, who have extensively studied orthovanadates up to pressures exceeding 50 GPa. We will make a systematic presentation and discussion of the different results reported in the literature. In addition, with the aim of contributing to the improvement of the actual understanding of the high-pressure properties of ternary oxides, the high-pressure behaviour of orhovanadates will be compared with related compounds; including phosphates, chromates, and arsenates. The behaviour of nanomaterials under compression will also be briefly described and compared with their bulk counterpart. Finally, the implications of the reported studies on technological developments and geophysics will be commented and possible directions for the future studies will be proposed.

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“…The refractive indices of BaF 2 and LaF 3 are known as 1.475 and 1.603, respectively . The densities of BaF 2 and LaF 3 crystals are 4.89 and 5.94 g/cm 3 , respectively . Therefore, the electronic polarizability of fluorine in BaF 2 and LaF 3 are obtained as 1.22 and 1.15 Å 3 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Novel gallate‐based oxide and oxyfluoride glasses with wide transparency, high refractive indices, and low dispersions

et al. 2019

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The glass‐forming region of a BaO‐La2O3‐Ga2O3 ternary system was confirmed and BaF2‐BaO‐La2O3‐Ga2O3 new oxyfluoride glasses were prepared by a containerless processing. We also analyzed the physical, thermal, and optical properties of new oxide and oxyfluoride glasses. The direct effects of the substitution of oxygen by fluorine and the effect of BaO and La2O3 on the refractive index and Abbe number were discussed on the basis of electronic polarizability and resonance wavelength of oscillator. The refractive indices increased with increasing La2O3 concentration because La2O3 increased the electronic polarizabilities. Abbe number increased with increasing BaO and fluorine concentration because of the decrease in resonance wavelength of oscillator. By the combination of the BaO, La2O3, and fluorine in the gallate glass system, we could obtain novel oxide and oxyfluoride glasses with high refractive index (1.81‐1.95) and high Abbe number (31‐55). The absorption edge in UV region shifted to the shorter wavelength and IR cut‐off wavelength shifted to the longer wavelength with increasing fluorine. Therefore, wide transparent glass was obtained from 262 nm to 11.3 μm.

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Trigonal LaF₃: a novel SRS-active crystal

Cited by 10 publications

References 43 publications

Nitrogen in Diamond

Nitrogen in Diamond

Recent progress on the characterization of the high-pressure behaviour of AVO4 orthovanadates

Novel gallate‐based oxide and oxyfluoride glasses with wide transparency, high refractive indices, and low dispersions

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Trigonal LaF3: a novel SRS-active crystal

Cited by 10 publications

References 43 publications

Nitrogen in Diamond

Nitrogen in Diamond

Recent progress on the characterization of the high-pressure behaviour of AVO4 orthovanadates

Novel gallate‐based oxide and oxyfluoride glasses with wide transparency, high refractive indices, and low dispersions

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Trigonal LaF₃: a novel SRS-active crystal