Growth, optical, dielectric and ESR studies on tetrathiourea mercury(II) tetrathiocyanato manganate(II): An organometallic complex NLO crystal

Rajarajan, K.; Mani, G.S.; Potheher, I. Vetha; Jesudurai, Joe; Vimalan, M.; Christy, Dennis; Madhavan, J.; Sagayaraj, P.

doi:10.1016/j.jpcs.2007.07.036

Cited by 26 publications

(7 citation statements)

References 11 publications

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“…Higher values of ε r at lower frequencies are because of the fact that at lower frequencies all the four types of polarization space charge, dipolar, ionic and electronic contribute the higher values of ε r . 26,27 Furthermore, it has been found that the value of ε r decreases sharply in the low frequency region. Such a radical fall in the value of ε r is mainly due to increase in interfacial space charge polarization.…”

Section: Optical Analysismentioning

confidence: 98%

Structural and optical characterization of Cr2O3 nanostructures: Evaluation of its dielectric properties

Abdullah¹,

Rajab²,

Al-Abbas³

2014

AIP Advances

194

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Articles you may be interested inThe Cr-substitution concentration dependence of the structural, electric and magnetic behaviors for Aurivillius Bi5Ti3FeO15 multiferroic ceramics J. Appl. Phys. 114, 234101 (2013); 10.1063/1.4849055Conversion of CH4/CO2 to syngas over Ni-Co/Al2O3-ZrO2 nanocatalyst synthesized via plasma assisted coimpregnation method: Surface properties and catalytic performance Synthesis of TiO 2 nanoparticles by hydrolysis and peptization of titanium isopropoxide solution AIP Conf.The structural, optical and dielectric properties of as-grown Cr 2 O 3 nanostructures are demonstrated in this paper. Powder X-ray diffractometry analysis confirmed the rhombohedral structure of the material with lattice parameter, a = b = 4.953 Å; c = 13.578 Å, and average crystallize size (62.40 ± 21.3) nm. FE-SEM image illustrated the mixture of different shapes (disk, particle and rod) of as-grown nanostructures whereas; EDS spectrum confirmed the elemental purity of the material. FTIR spectroscopy, revealed the characteristic peaks of Cr-O bond stretching vibrations. Energy band gap (3.2 eV) of the nanostructures has been determined using the results of UV-VIS-NIR spectrophotometer. The dielectric properties of the material were checked in the wide frequency region (100Hz-30 MHz). In the low frequency region, the matrix of the dielectric behaves like source as well as sink of electrical energy within the relaxation time. Low value of dielectric loss exhibits that the materials posses good optical quality with lesser defects. The ac conductivity of the material in the high frequency region was found according to frequency power law. The physical-mechanism and the theoretical-interpretation of dielectric-properties of Cr 2 O 3 nanostructures attest the potential candidature of the material as an efficient dielectric medium. C 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

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Section: Optical Analysismentioning

confidence: 98%

Structural and optical characterization of Cr2O3 nanostructures: Evaluation of its dielectric properties

Abdullah¹,

Rajab²,

Al-Abbas³

2014

AIP Advances

194

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“…The higher values of tan δ at lower frequencies may be attributed to space-charge polarization owing to charged lattice defects [19]. The characteristic of low dielectric constant and dielectric loss with high frequency suggests that the sample possesses enhanced optical quality with fewer defects and this parameter is of vital importance for NLO applications [22].…”

Section: Dielectric Studiesmentioning

confidence: 99%

Synthesis, growth and characterization of L-proline dimercuricchloride single crystals for frequency conversion applications

Kalaiselvi¹,

Jayavel

2012

Appl. Phys. A

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A semi-organic nonlinear optical L-proline dimercuricchloride (LPDMC) material has been synthesized. LPDMC single crystals were grown from aqueous solution by a slow cooling method. Good quality single crystals of size 19 × 6 × 3 mm 3 have been grown over a period of 3 weeks. The grown crystals have been subjected to single crystal X-ray diffraction analysis to determine the cell parameters. The title compound crystallizes in the triclinic system with a noncentrosymmetric space group P1 and with unit-cell parameters a = 7.2742(4) Å, b = 9.4472(5) Å, c = 10.4767(6) Å, α = 108.621(3) • , β = 107.260(2) • , γ = 97.353(2) • and volume = 631.51(6) Å 3 . Optical and dielectric properties of the crystals have been studied. The thermal stability of the crystals was determined by thermogravimetric analysis/differential thermal analysis. The second harmonic generation efficiency of the crystals was obtained by the classical powder technique using a Nd:YAG laser and it is found to be 2.5 times that of potassium dihydrogen phosphate.

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“…At high frequencies ion vibrations may be the only source of dielectric loss and so has the minimum value [23]. The characteristic of low dielectric constant and dielectric loss with high frequency for a given sample suggests that the sample possesses enhanced optical quality with lesser defects and this parameter is of vital importance for various nonlinear optical materials and their applications [24]. The dielectric loss also shows dispersion in the low frequency region.…”

Section: Resultsmentioning

confidence: 99%

Dielectric and AC conductivity studies of CdSe nanocrystals doped sol–gel silica matrices

Jyothy

Kumar

Karthika

et al. 2010

Journal of Alloys and Compounds

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Growth, optical, dielectric and ESR studies on tetrathiourea mercury(II) tetrathiocyanato manganate(II): An organometallic complex NLO crystal

Cited by 26 publications

References 11 publications

Structural and optical characterization of Cr2O3 nanostructures: Evaluation of its dielectric properties

Structural and optical characterization of Cr2O3 nanostructures: Evaluation of its dielectric properties

Synthesis, growth and characterization of L-proline dimercuricchloride single crystals for frequency conversion applications

Dielectric and AC conductivity studies of CdSe nanocrystals doped sol–gel silica matrices

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