Influence of Li and Nb ratios on the defect structure and exposure energy in LiNbO3:Fe:Mn:Zr crystals

Xu, Chao; Yang, Chunhui; Dai, Li; Sun, L.; Xu, Youlong; Cao, Liangcai

doi:10.1016/j.jallcom.2011.01.031

Cited by 17 publications

(3 citation statements)

References 24 publications

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“…Thus it seems to be an excellent recording medium for practical holographic storage devices. The spectroscopy, defect structure and optical characteristics of LN:Zr,Fe,Mn with different doping concentrations and [Li]/[Nb] ratios were investigated [ 73 , 74 ]. The high diffraction efficiency and significantly enhanced response speed and sensitivity were also reported at 488 nm laser [ 75 ].…”

Section: The Photorefraction Of Tetravalent Ions Co-doped Linbo mentioning

confidence: 99%

Recent Advances in the Photorefraction of Doped Lithium Niobate Crystals

Kong

Liu

2012

Materials

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The recent advances in the photorefraction of doped lithium niobate crystals are reviewed. Materials have always been the main obstacle for commercial applications of photorefractive holographic storage. Though iron-doped LiNbO3 is the mainstay of holographic data storage efforts, several shortcomings, especially the low response speed, impede it from becoming a commercial recording medium. This paper reviews the photorefractive characteristics of different dopants, especially tetravalent ions, doped and co-doped LiNbO3 crystals, including Hf, Zr and Sn monodoped LiNbO3, Hf and Fe, Zr and Fe doubly doped LiNbO3, Zr, Fe and Mn, Zr, Cu and Ce triply doped LiNbO3, Ru doped LiNbO3, and V and Mo monodoped LiNbO3. Among them, Zr, Fe and Mn triply doped LiNbO3 shows excellent nonvolatile holographic storage properties, and V and Mo monodoped LiNbO3 has fast response and multi-wavelength storage characteristics.

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Section: The Photorefraction Of Tetravalent Ions Co-doped Linbo mentioning

confidence: 99%

Recent Advances in the Photorefraction of Doped Lithium Niobate Crystals

Kong

Liu

2012

Materials

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“…Doping with ions of high polarization ability enhances the deformation degree of O 2− 2p orbits, and therefore decreases the width of forbidden band and the transition energy, resulting in the redshift of the absorption edge [ 50 ]. The polarization ability values of the Fe 3+ , Li + , and Nb 5+ ions are 55.32, 2.49, and 58.51, respectively [ 51 ]. Therefore, the Fe ion substitutes for the Li ion at the regular Li site.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Defect Structure of Congruent and Fe-Doped LiNbO3 Powders Synthesized by the Combustion Method

Chen

et al. 2017

Materials

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Fe-doped LiNbO3 synthesized by the combustion method to seek new multiferroic materials exhibits room-temperature ferromagnetism, as reported in our previous work. In this work, the defect structure of congruent and Fe-doped LiNbO3 (0.57–3.3 mol %) powders was investigated in detail by several methods. The molar ratio of [Li]/([Li]+[Nb]) was determined by the Curie temperature (Tc) via DSC. Two peaks of Tc were observed due to phase splitting, and the phase at lower Tc disappears as the Fe doping concentration increases. The coexistence of two different oxidation states of Fe ions in LiNbO3 was probed by XPS and UV-Vis spectroscopy. The Raman spectra exhibit displacements along the c axis of Li and Nb ions, and a deformation of the NbO6 framework owing to Fe doping. Several doping models were applied in the Rietveld refinement of powder X-ray diffraction collected by synchrotron radiation. The fitting by the Nb vacancy model leads to an improbably distorted structure of congruent LiNbO3. In Fe-doped LiNbO3, we conjecture that Li and Nb vacancies coexist in the lattice structure; Fe+2/Fe+3 ions are substituted for Li ions at the regular Li site and may push the anti-site NbLi ion back to the regular Nb site.

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“…Slow evaporation was used to try to develop amino acids (L-alanine, L-arginine, and Glycine) doped sodium acid phthalate in this study. Because of the impact of doping on intrinsic defects, the effect of dopants is important [20][21][22][23][24][25]. The reports and characterization suggest that dopants strengthen optical, mechanical, and other properties.…”

Section: Introductionmentioning

confidence: 99%

Growth, structural, optical and mechanical studies on Amino acids doped Nonlinear optical sodium acid phthalate single crystals

Marudhu

Baraniraj²,

Krishnan

et al. 2022

Phys. Chem. Solid St.

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The slow evaporation technique was used to successfully grown amino acid doped sodium acid phthalate (NaAP) crystals at room temperature. A great deal of research has been done on the effects of amino acids on NaAP growth and characteristics. X-ray diffraction was used to examine the crystal structure and lattice parameters of the grown crystals. Functional groups were found in the title crystals, which revealed themselves utilizing FTIR spectra. The optical transparency of the doped crystals was noticed by measurements of optical absorption. In order to assess the mechanical strength of the produced crystals, Vickers microhardness tests were employed. The technique of Kurtz powder was utilized to calculate the second harmonic generation (SHG) performance of the cultivated crystals.

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Influence of Li and Nb ratios on the defect structure and exposure energy in LiNbO3:Fe:Mn:Zr crystals

Cited by 17 publications

References 24 publications

Recent Advances in the Photorefraction of Doped Lithium Niobate Crystals

Recent Advances in the Photorefraction of Doped Lithium Niobate Crystals

Investigation of the Defect Structure of Congruent and Fe-Doped LiNbO3 Powders Synthesized by the Combustion Method

Growth, structural, optical and mechanical studies on Amino acids doped Nonlinear optical sodium acid phthalate single crystals

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