Crystal Structure Induced Enhanced Afterglow Luminescence from Rare‐Earth Ion Doped Strontium Silicate Phosphors

2021 ◽  
Vol 6 (17) ◽  
pp. 4047-4055
Author(s):  
Vishnu V. Jaiswal ◽  
Siju Mishra ◽  
D. Haranath
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Rare Earth Ion ◽  
Strontium Silicate ◽  
Silicate Phosphors

scholarly journals The Crystal Structure of Rare-Earth Impurity Centers R3+ in MeF2: ab initio Calculation

2019 ◽  
Vol 14 (4) ◽  
pp. 91-102
Author(s):  
V. A. Chernyshev ◽  
A. V. Arkhipov
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Ab Initio ◽  
Periodic Structures ◽  
Hybrid Functional ◽  
Rare Earth Ion ◽  
Hartree Fock ◽  
Impurity Centers ◽  
Angular Coordinates ◽  
Impurity Ion

Ab initio calculations of the impurity centers R3+ (R = La – Lu) in CaF2 were carried out. The calculations were performed by using hybrid functional which takes into account both local and nonlocal (at the Hartree – Fock formalism) exchange. The crystal structure of impurity centers was investigated. The distance “rare-earth ion – ligand”, the radial and angular coordinates of the ions at several coordination spheres near to the impurity ion are determined. Calculations were carried out in the program CRYSTAL17, designed to simulate periodic structures within the MO LCAO approach.

scholarly journals Structure, Luminescence, and Magnetic Properties of Crystalline Manganese Tungstate Doped with Rare Earth Ion

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3717
Author(s):  
Jae-Young Jung ◽  
Soung-Soo Yi ◽  
Dong-Hyun Hwang ◽  
Chang-Sik Son
Keyword(s):  
Magnetic Field ◽  
Rare Earth ◽  
Sintering Temperature ◽  
Luminescent Properties ◽  
Concentration Quenching ◽  
Rare Earth Ions ◽  
Precipitation Method ◽  
Rare Earth Ion ◽  
Co Precipitation ◽  
Quenching Phenomenon

The precursor prepared by co-precipitation method was sintered at various temperatures to synthesize crystalline manganese tungstate (MnWO4). Sintered MnWO4 showed the best crystallinity at a sintering temperature of 800 °C. Rare earth ion (Dysprosium; Dy3+) was added when preparing the precursor to enhance the magnetic and luminescent properties of crystalline MnWO4 based on these sintering temperature conditions. As the amount of rare earth ions was changed, the magnetic and luminescent characteristics were enhanced; however, after 0.1 mol.%, the luminescent characteristics decreased due to the concentration quenching phenomenon. In addition, a composite was prepared by mixing MnWO4 powder, with enhanced magnetism and luminescence properties due to the addition of dysprosium, with epoxy. To one of the two prepared composites a magnetic field was applied to induce alignment of the MnWO4 particles. Aligned particles showed stronger luminescence than the composite sample prepared with unsorted particles. As a result of this, it was suggested that it can be used as phosphor and a photosensitizer by utilizing the magnetic and luminescent properties of the synthesized MnWO4 powder with the addition of rare earth ions.

Synthesis and crystal structure of (Ca, R)(Mn, Ti)O3 (R, rare earth)

2006 ◽  
Vol 408-412 ◽  
pp. 1173-1176 ◽  
Author(s):  
Migaku Kobayashi ◽  
Ryouko Katsuraya ◽  
Syou Kurita ◽  
Makoto Yamaguchi ◽  
Hiroshisa Satoh ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Synthesis And Crystal Structure

scholarly journals Conduction-band states and the 5d-4f laser transition of rare-earth ion dopants

1997 ◽  
Author(s):  
Stephen A. Payne ◽  
Christopher D. Marshall ◽  
Andy J. Bayramian ◽  
Janice K. Lawson
Keyword(s):  
Rare Earth ◽  
Conduction Band ◽  
Rare Earth Ion ◽  
Laser Transition

Photon echoes in an amplifying rare-earth ion-doped crystal

2006 ◽  
Author(s):  
V. Crozatier ◽  
G. Gorju ◽  
F. Bretenaker ◽  
J.-L. Le Gouet ◽  
I. Lorgere ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Ion ◽  
Photon Echoes

Crystal structure and magnetic ordering of the rare-earth and Cu moments inRBa2Cu2NbO8(R=Nd,Pr)

1993 ◽  
Vol 47 (22) ◽  
pp. 15256-15264 ◽  
Author(s):  
N. Rosov ◽  
J. W. Lynn ◽  
H. B. Radousky ◽  
M. Bennahmias ◽  
T. J. Goodwin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Magnetic Ordering ◽  
The Rare Earth

High-pressure Syntheses and Characterization of the Rare-earth Fluoride Borates RE2(BO3)F3 (RE=Tb, Dy, Ho)

2013 ◽  
Vol 68 (11) ◽  
pp. 1198-1206 ◽  
Author(s):  
Ernst Hinteregger ◽  
Michael Enders ◽  
Almut Pitscheider ◽  
Klaus Wurst ◽  
Gunter Heymann ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Rare Earth ◽  
Monoclinic Space Group ◽  
Rare Earth Fluoride ◽  
Earth Fluoride ◽  
Structure Determinations ◽  
New Compounds ◽  
Rare Earth Fluorides

The new rare-earth fluoride borates RE2(BO3)F3 (RE=Tb, Dy, Ho) were synthesized under highpressure/ high-temperature conditions of 1:5 GPa=1200 °C for Tb2(BO3)F3 and 3:0 GPa=900 °C for Dy2(BO3)F3 and Ho2(BO3)F3 in a Walker-type multianvil apparatus from the corresponding rareearth sesquioxides, rare-earth fluorides, and boron oxide. The single-crystal structure determinations revealed that the new compounds are isotypic to the known rare-earth fluoride borate Gd2(BO3)F3. The new rare-earth fluoride borates crystallize in the monoclinic space group P21/c (Z = 8) with the lattice parameters a=16:296(3), b=6:197(2), c=8:338(2) Å , b =93:58(3)° for Tb2(BO3)F3, a= 16:225(3), b = 6:160(2), c = 8:307(2) Å , b = 93:64(3)° for Dy2(BO3)F3, and a = 16:189(3), b = 6:124(2), c = 8:282(2) Å , β= 93:69(3)° for Ho2(BO3)F3. The four crystallographically different rare-earth cations (CN=9) are surrounded by oxygen and fluoride anions. All boron atoms form isolated trigonal-planar [BO3]3- groups. The six crystallographically different fluoride anions are in a nearly planar coordination by three rare-earth cations.

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