Pressure-induced amorphization of YVO 4 :Eu 3+ nanoboxes

Progress in Materials Science

Garg

2018

108

143

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.

Section: Historical Backgroundmentioning

confidence: 99%

“…To the best of our knowledge there are only three articles published on the HP properties on AVO4 compounds. Out of them, two are on LaVO4 and one is on YVO4 [50,52,98].…”

Section: Nanoparticles Of Avo4 Compoundsmentioning

confidence: 99%

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

Progress in Materials Science

Garg

2018

108

143

“…This indicates that it is timely to carry our more studies on nanocrystal vanadates. Such studies could offer novel approaches for the engineering of original materials with tailored properties [152]. One of the issues that could be interesting to explore is the possibility of preparing phase of InVO4 with hexa-coordinated vanadium.…”

Section: Future Perspectivesmentioning

confidence: 99%

High pressure crystal structures of orthovanadates and their properties

Journal of Applied Physics

2020

Pressure-induced phase transitions in orthovanadates have led to interesting physical phenomena. The observed transitions usually involve large volume collapses and drastic changes in the electronic and vibrational properties of the materials. In some cases, the phase transitions implicate coordination changes in vanadium, which has important consequences in the physical properties of vanadates. In this Perspective, we explore the current knowledge of the behavior of MVO4 vanadates under compression. In particular, we summarize studies of the structural, vibrational, and electronic properties and a few illustrative examples of high-pressure research in the compounds of interest are discussed. A systematic understanding of the highpressure behavior of MVO4 compounds is presented, putting the emphasis on results that could be relevant for practical applications. Recent advances and future challenges in the study of orthovanadates under extreme pressure will be reviewed, along with conclusions that could have consequences for the studies of related oxides. Some ideas on topics that may lead to exciting breakthroughs in the near future will be presented too.

“…It would be interested to explore in the future if, due to the high surface‐to‐volume ratio , monazite nanomaterials show a different high‐pressure behavior than bulk monazites. Some of the interesting issues to explore are how the axial and bulk compressibility are affected by the particle size , and if the high‐pressure structural sequence is modified, and/or amorphization is triggered as found in zircon‐type nanoparticles .…”

Section: Future Challengesmentioning

confidence: 99%

High‐pressure phase transitions and properties of MTO₄ compounds with the monazite‐type structure

Physica Status Solidi (b)

2017

This article extensively reviews recent developments on high‐pressure studies carried out on MTO4 monazite‐type oxides. The group of compounds considered includes phosphates, vanadates, selenates, and chromates, among others. The occurrence of pressure‐induced phase transitions will be discussed. The compressibility and pressure stability range of the different compounds will be also examined; as well as the influence of compression in the vibrational, optical, and transport properties. A part of the report will be devoted to discuss the determination of the crystal structure of the high‐pressure post‐monazite phases and to look into the influence of compression in the electronic and vibrational properties. Similarities and differences of the high‐pressure behavior of different members of the monazite family will be commented. The reviewed results are of importance for basic research and Earth sciences, and for the development of technological applications. Finally, future challenges associated to the reviewed subject will be presented.