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Pressure-induced amorphization of YVO4:Eu3+ nanoboxes

DOI: 10.1088/0957-4484/27/2/025701 DOI Help

Authors: J. Ruiz Fuertes (Goethe-Universität) , O. Gomis (Universidad Politécnica de Valencia) , S. Leon Luis (Universidad de La Laguna) , N. Schrodt (Goethe-Universität) , F. J. Manjon (Universitat Politècnica de València) , S. Ray (Universitat Politècnica de València) , D. Santamaria Perez (University Complutense of Madrid) , J. A. Sans Tresserras (Universitat Politècnica de València, Spain) , H. M. Ortiz (Universitat Politècnica de València) , D. Errandonea (Universidad de Valencia) , C. Ferrer-Roca (Universidad de Valencia) , A. Segura (Universidad de Valencia) , D. Martinez Garcia (University of Valencia) , V. Lavin (Universidad de La Laguna) , U. R. Rodríguez-Mendoza (Universidad de La Laguna) , A Muñoz (Universidad de La Laguna)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nanotechnology , VOL 27

State: Published (Approved)
Published: November 2015
Diamond Proposal Number(s): 3652 , 6517

Abstract: A structural transformation from the zircon-type structure to an amorphous phase has been found in YVO4:Eu3+ nanoboxes at high pressures above 12.7 GPa by means of x-ray diffraction measurements. However, the pair distribution function of the high-pressure phase shows that the local structure of the amorphous phase is similar to the scheelite-type YVO4. These results are confirmed both by Raman spectroscopy and Eu3+ photoluminescence which detect the phase transition to a scheelite-type structure at 10.1 and 9.1 GPa, respectively. The irreversibility of the phase transition is observed with the three techniques after a maximum pressure in the upstroke of around 20 GPa. The existence of two 5D0 $\to $ 7F0 photoluminescence peaks confirms the existence of two local environments for Eu3+, at least for the low-pressure phase. One environment is the expected for substituting Y3+ and the other is likely a disordered environment possibly found at the surface of the nanoboxes.

Journal Keywords: high pressure; amorphization; nanocrystal

Subject Areas: Physics, Materials

Instruments: I15-Extreme Conditions

Other Facilities: P2.02 at PETRA III

Added On: 05/12/2015 18:39

Discipline Tags:

Materials Science Nanoscience/Nanotechnology

Technical Tags:

X-ray Powder Diffraction