High-pressure powder x-ray diffraction study of EuVO4

Garg, Alka B.; Errandonea, Daniel

doi:10.1016/j.jssc.2015.02.003

Cited by 45 publications

(62 citation statements)

References 55 publications

(115 reference statements)

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“…The equation of state has been determined for zircon and scheelite phases from the experiment, with values of the bulk modulus K 0 of 149 (6) GPa and 199(9) GPa for zircon and scheelite, respectively. In a recent M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 3 study, a similar result has been obtained using methanol-ethanol as pressure transmitting medium [14]; however, here the transition is reported to start at 6.8 GPa, and the phase coexistence is observed up to 10.1 GPa; the authors have observed that the x coordinate of the oxygen atom increases whereas the z coordinate decreases (both marginally, details not given).…”

Section: This Behavior Has Beensupporting

confidence: 65%

“…The volume collapse, │∆V│/V 0, at the zircon-toscheelite transition pressure is 10.7%, being close to the collapse value of 10% reported in Refs. [11] and [14] for the same material. The existing data on bulk moduli for the zircon-type and scheelite-type phases are summarized in Tables 3 and 4, whereas the variations with pressure of the bulk moduli and their derivatives observed in our experiment are displayed in Fig.…”

Section: Experimental Results On the Structure And Eos Of Euvomentioning

confidence: 99%

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Equation of state and electronic properties of EuVO4: A high-pressure experimental and computational study

Paszkowicz

López-Solano

Piszora

et al. 2015

Journal of Alloys and Compounds

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Section: This Behavior Has Beensupporting

confidence: 65%

Section: Experimental Results On the Structure And Eos Of Euvomentioning

confidence: 99%

Equation of state and electronic properties of EuVO4: A high-pressure experimental and computational study

Paszkowicz

López-Solano

Piszora

et al. 2015

Journal of Alloys and Compounds

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“…After these reports, systematic HP investigations followed on RVO4 compounds by various researchers, including the authors of this review [25,26,28,29,33,36,59,96,97]. Measurements on these compounds now have established beyond doubt that the RVO4 compounds with smaller ionic radii (Sm-Lu) transform from the zircon to the scheelite phase below 10 GPa with nearly 10 % volume discontinuity.…”

Section: X-ray Diffraction Experimentsmentioning

confidence: 99%

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

Errandonea

Garg

2018

Progress in Materials Science

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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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“…This is a common phenomenon observed in many compounds. 30,31 Therefore, only data measured under quasi-hydrostatic conditions should be used to determine the bulk modulus from compression studies. In our case, if only the results measured under non-hydrostatic conditions are fitted with a second-order EOS, B 0 ¼ 284(25) GPa is obtained.…”

Section: A Sample Characterizationmentioning

confidence: 99%

Cobalt ferrite nanoparticles under high pressure

Saccone

Ferrari

Errandonea

et al. 2015

Journal of Applied Physics

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Articles you may be interested inMicrostructure and magnetic properties of MFe2O4 (M = Co, Ni, and Mn) ferrite nanocrystals prepared using colloid mill and hydrothermal method J. Appl. Phys. 117, 17A328 (2015) We report by the first time a high pressure X-ray diffraction and Raman spectroscopy study of cobalt ferrite (CoFe 2 O 4 ) nanoparticles carried out at room temperature up to 17 GPa. In contrast with previous studies of nanoparticles, which proposed the transition pressure to be reduced from 20-27 GPa to 7.5-12.5 GPa (depending on particle size), we found that cobalt ferrite nanoparticles remain in the spinel structure up to the highest pressure covered by our experiments. In addition, we report the pressure dependence of the unit-cell parameter and Raman modes of the studied sample. We found that under quasi-hydrostatic conditions, the bulk modulus of the nanoparticles (B 0 ¼ 204 GPa) is considerably larger than the value previously reported for bulk CoFe 2 O 4 (B 0 ¼ 172 GPa). In addition, when the pressure medium becomes non-hydrostatic and deviatoric stresses affect the experiments, there is a noticeable decrease of the compressibility of the studied sample (B 0 ¼ 284 GPa). After decompression, the cobalt ferrite lattice parameter does not revert to its initial value, evidencing a unit cell contraction after pressure was removed. Finally, Raman spectroscopy provides information on the pressure dependence of all Raman-active modes and evidences that cation inversion is enhanced by pressure under non-hydrostatic conditions, being this effect not fully reversible. V C 2015 AIP Publishing LLC. [http://dx

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High-pressure powder x-ray diffraction study of EuVO4

Cited by 45 publications

References 55 publications

Equation of state and electronic properties of EuVO4: A high-pressure experimental and computational study

Equation of state and electronic properties of EuVO4: A high-pressure experimental and computational study

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

Cobalt ferrite nanoparticles under high pressure

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