IOSR-JAP   National Conference on Current Advancements in Physics

Abstract: Ammonium fluoro antimonate (NH4)3Sb4F15 crystals were grown by solution method and various properties of grown crystals were analyzed by various experimental tools. The structural study of the grown crystal was carried out by XRD analysis and crystal structure was identified. The vibrational frequencies of of various group ligands in the crystal have been derived from the Fourier transform infrared (FT-IR) spectrum. The optical transmission of the sample was found by UV-vis-NIR spectral analysis. Second harmonic generation (SHG) efficiency was analyzed for the sample by Kurtz powder technique. TG/DTA studies were carried out for the grown crystal.

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Abstract: The single crystal of glycine doped sodium chloride, a semi organic non linear optical material has been grown from solution (pH = 6) by slow evaporation at room temperature. The expected functional groups of the title compound were confirmed by the FTIR spectral analysis. The crystalline nature and its various planes of reflections were observed by the powder XRD. The optical quality of single crystal of glycine doped sodium chloride identified by UV visible studies.

Keywords - Glycine, Sodium chloride, FTIR, XRD and crystal.

[1] R. Ramesh, M. Aravinthraj, M. Selvam and D. Rajkumar, Pelagia Research Library Advances in Applied Science Research, 2 (5), 2011, 136
[2] S. Palaniswamy, O.N. Ranganathan, Rasayan J.Chem. 1, 2008, 782
[3] B. Narayana Moolya, S. M. Dharmaprakash, Mater. Lett. 61, 2007, 3559
[4] S.Palaniswamy and O.N.Balasundaram, Rasayan J. Chem. Vol.2(1), 2009, 49
[5] Xia Yang, Jie Lu, Xiu-Juan Wang and Chi-Bun Ching, Journal of Crystal Growth 310, 2008, 604

Abstract: Single crystals of triglycine sulpho-phosphate (TGSP) doped with cesium chloride were grown by slow evaporation technique. From single crystal XRD studies, it is observed that the grown crystals crystallize in monoclinic structure. Mechanical studies were performed by measuring microhardness of the samples at different loads. Second order NLO studies were carried out to understand the second order NLO activity. The ferroelectric nature of the sample has been analyzed by measuring dielectric constant and loss factor. Third order NLO parameters have been measured by Z-scan technique. LDT values of the samples have been measured using a Nd:YAG laser and the results are discussed.

Keywords: TGSP crystal, doping, solution growth, single crystal, characterization , LDT, SHG

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Abstract: The magnetic and magneto-caloric properties of intermetallic compound, Nd4PtMg have investigated by magnetization and heat capacity measurements. The compound exists in prototype Gd4RhIn cubic type structure. It has been observed that Nd4PtMg changes from paramagnetic to ferromagnetic state with a second order magnetic phase transition at Curie temperature of TC ~ 26 K. The compound shows a large reversible magneto-caloric effect around TC. In the varying magnetic field, Nd4PtMg undergoes magnetic entropy change with a maximum value of21.3 J/kg-K.

Keywords: Magneto-caloric Effect, Phase transition, Curie temperature

[1]. K.A. Gschneidner Jr., V.K. Pecharsky and A.O. Tsokol, Recent developments in magnetocaloric materials, Reports on Progress in Physics, 68, 2005, 1479 - 1539.
[2]. Shen B G, Hu FX, Dong QY and Sun JR, Magnetic properties and magnetocaloric effects in NaZn13-type La(Fe, Al)13-based compounds, Chinese Physics B, 22 (1), 2013, 017502.
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[4]. L. Li, O. Niehaus, M. Kersting and R. Pöttgen, Reversible table-like magnetocaloric effect in Eu4PdMg over a very large temperature span, Applied Physics Letters, 104, 9, 2014, 092416 (1-4).

Abstract: Undoped and copper doped Lithium sulphate monohydrate(LSMH) single crystals have been grown by slow evaporation of an aqueous solution of deionized water at room temperature. The monoclinic structure of the grown crystals is confirmed by powder X – ray diffraction analysis. The presence of functional group vibrations in the grown crystals are identified through FTIR analysis. Tauc plot of the grown crystals were obtained from UV – Vis spectral analysis to test the insulating behavior of the crystals. Linear optical parameters such as absorption coefficient, extinction coefficient, reflectance, refractive index, susceptibility, real and imaginary part of dielectric constant, electronic polarizablity, optical and electrical conductivity of the grown crystals were calculated.

Keywords: Inorganic crystals, NLO crystals, Optical constants, Slow evaporation, UV studies.

[1] S.P. Puppalwar, S.J. Dhoble and A. Kumar Luminescence, 2011, 26, 456-461.

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[3] P.Rajesh and P. Ramasamy: Physica B, 2010, 405, 2401-2406.

[4] A. Puhal Raj, C.Ramachandra Raja, Spectrochimica Acta Part A, 97(2012) 83-87

[5] G.Rajadurai, A.Puhal Raj and S.Pari, Archives of Applied Science Research, 2013, 5(3): 247-253

Abstract: Glycine is available in many polymeric forms like -glycine, -glycine and -glycine and among these, gamma-glycine (-glycine) crystallizes in a non-centrosymmetric space group and hence it possesses nonlinear optical (NLO) and piezoelectric properties. Single crystals of gamma-glycine were grown by slow evaporation solution growth technique in the aqueous solution of cesium chloride. To obtain the sample of gamma-glycine, commercially available alpha-glycine and cesium chloride were taken in 2:1 molar ratio and it took about 25 days to harvest crystals of gamma-glycine.............

Keywords: gamma-glycine, single crystal, solution growth, XRD, SHG, spectral method

[1] Tapati Mallik, Tanusree Kar, Cryst. Res. Technol. 40 (2005) 778.

[2] R. Muralidharan, R. Mohankumar, P.M. Ushasree, R. Jayavel, P. Ramasamy, J. Crystal Growth 234 (2002) 545.

[3] K. Srinivasan J. Crystal Growth 311 (2008) 156.

[4] J. Zaccaro, J. Matic, A.S. Myerson, B.A. Garetz, Cryst. Growth Des. 1 (2001) 5.

[5] K. Allen, R.J. Davey, E. Ferrari, C. Towler, G.J. Tiddy, Cryst. Growth Des. 2 (2002) 523.

Abstract: Di-Ammonium Hydrogen Phospho Tartrate (DAHPT) single crystals have been grown successfully by slow evaporation technique. The structure of the grown crystal was estimated by single crystal X-ray diffraction technique. Dielectric study was carried out in the frequency range 20 Hz – 1 MHz and at different temperatures between 30° C and 150° C. The impedance analysis was studied using an impedance analyser to find the impedance, bulk resistance, and DC conductivity of the sample. The values of nonlinear refractive index, nonlinear absorption and third order nonlinear susceptibility have been studied using Z-scan technique.

Key Words: Dielectric, impedance, slow evaporation, Z-scan, single crystal

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Abstract: Nucleation parameters such as solubility, induction period, interfacial energy and nucleation rate and critical radius, Gibbs free energy change, number of molecules in the critical nucleus have been investigated for the aqueous solution growth of a semi-organic nonlinear optical (NLO) material of L-Leucine doped Zinc Tris-thiourea sulfate (ZTS). From the results, it was observed that the induction period increases with increase in additive concentration L-leucine into ZTS solutions..............

Key Words: Nucleation, solution growth, single crystal, NLO, doping, solubility, characterization

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Abstract: Tri Glycine Sulphate (TGS) is a well known ferroelectric and pyroelectric material below its critical temperature (49oC) [1]. It finds application in the fabrication of infrared detectors, pyroelectric vidicon tube operating at room temperature, in the fabrication of capacitors, transducers and sensors [2-3]. TGS belongs to the biaxial monoclinic system associated with the polar space group P21 in the ferroelectric phase and it crystallizes in P21/m space group in the paraelectric phase [4-6] . The monoclinic b-axis is known to be parallel to spontaneous polarization direction. Therefore the b-cut (010) crystals are technologically important for many device applications [7-9]. Ferro electric TGS exhibits antiparallel

[1]. N. P. Rajesh, C. K. Mahadevan, P. Sanathana Raghavan, Yen-Chieli Huang, P. Ramasamy, Mat. Lett. 55 (2002) 394-396.
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Abstract: Tungsten trioxide thin films were deposited on glass substrates by microprocessor controlled spray pyrolysis method. The characterization and gas sensitivity of WO3 thin film sensor were investigated. The WO3 thin films were observed to be sensitive for NH3 vapor at different concentrations (5-200ppm) at room temperature. The maximum sensitivity for NH3 vapor by WO3 sensor was found at 200ppm concentration. The response (~ 50s) and recovery (~30s) were the main features of these sensors. The high sensitivity, quick response and fast recovery indicated that WO3 thin film sensors are selective for NH3 vapor when compared with ethanol, acetone and toluene vapors.

Keywords: Microprocessor controlled spray pyrolysis, NH3 sensor, Room temperature, WO3 thin film, XRD.

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Abstract: Cu- doped TiO2 thin films were synthesised by spray pyrolysis method onto glass substrates at a substrate temperature of about 3500 c and annealed at 5000 c for 1 hour. The annealed films were characterised by x-ray diffraction, scanning electron microscope and also subjected to photoluminescence studies in order to characterize the structural property, surface morphology and to determine trapping of charge carriers in semiconductors. The diffraction peaks from XRD were index to anatase phase for both undoped and doped TiO2 thin films............

Keywords: TiO2, XRD, SEM, EDAX, PL

[1]. N.H.Sun, X.C.Bai, M.W.Li,B.L.Yao Adv.Mater.Res 210, 2012, 482-484.
[2]. Tae Young Lee,P.S.Alegaonkar,Ji-Beom Yoo "Fabrication of dye syntesised solar cell using TiO2 coated carbon nanotubes ".Thin solid films 515,2007,5131-5135.
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Abstract: The recent advancement in the nuclear physics lead to a state of art nuclear equipment's where different kinds of isotopes like 99mTc, 111In, 123I, 133Xe are used as radioactive tracer in imaging to diagnose the diseases, Electric power generation, National security etc., This recent development paved the way for the nuclear physicist to go on to find different isotopes and methods to design different types of equipment which are used for various purpose. This Paper gives a gist of few recent developments and it's applications with an importance to Medical diagnosis with heavy ion beams or protons, Positron Emission Tomography (PET) and Magnetic resonance imaging (MRI).

Keywords: PET, MRI, Scintillators, Tracers, PET/MR

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[2]. Legacy, A. V. (2010). Biological and Environmental Research in the Atomic Age. US Department of Energy, The Office of Biological and Environmental Research, 25-26.
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Abstract: Tin oxide (SnO2) nanoparticles were successfully synthesized via solvothermal method using the microwave oven technique at various calcination temperatures. The size of the nanoparticles was found to depend on calcination temperature. The near about spherical SnO2 nanoparticles show a pure tetragonal rutile crystalline structure. A decrease in the band gap which is contrary to the quantum size effect was shown by the synthesized SnO2 nanoparticles. SnO2 nanoparticles were characterized by X-ray diffraction, Transmission Electron Spectroscopy, Fourier Transformed Infrared spectroscopy, UV-Visible Spectroscopy,

Keywords: Absorption, solvothermal, amorphous, oxidation.

[1]. L. C. Nehru, V. Swaminathan, C. Sanjeeviraja, "Photoluminescence Studies on Nanocrystalline Tin Oxide Powder for Optoelectronic Devices", American Journal of Materials Science 2012, 2(2): 6-10
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[5]. Belina Xavier, A. Ramanand and P.Sagayaraj "A modified Solvothermal approach for developing Au/SnO2nanocomposites" Der Pharma Chemical, 2012, 4(4):1477-1480.

Abstract: Quantum chemical calculations were carried out to study the molecular structure for indacaterol. To investigate the optimized molecular structure, bond length, bond angle and tetrahedral angels, Mullikan atomic charges, HOMO, LUMO energy levels, energy gap, dipole moment, total energy and some other physical parameters, DFT calculations were carried out using 6-31G basis set with B3LYP.

Keyword: Dipole moment, HOMO-LUMO energy gap, Indacaterol, Mullikan charges.

[1]. Dong Jun K, and Byung Tae C., Bulletin of Korean Chem. Soc., 24, 2003, 1641-1648.
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Abstract: Metal oxide nanoparticle is a versatile material with much scientific and industrial application. Zinc Oxide (ZnO) and Cd doped Zinc Oxide were prepared by Co-precipitation method. ZnO nanoparticle play important role in the enhancement of dielectric properties of nano composites. The crystalline nature of the sample were also confirmed by X-ray diffraction pattern. The crystalline size of the pure and Cd doped nano particle were determined as 21 nm and 18 nm. FT-IR spectra identify the functional groups present in the molecular structure.............

KEYWORDS: Antibacterial activity, Nanoparticle, SEM with EDAX, X-ray diffraction, Zinc oxide.

[1]. LatifEntisar E.AL-Abodi,DhefafH.badri,Jawad Al Khafagi. preparation,characterization and electrical study of nanocomposites. American journal of polymer science ,2(6),(2012); 135-140
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[5]. Heh-Chang Huang, Tsung-EongHsieh.preparation and characterization of transparent UV-curable ZnO-acrylic nanocomposites. Elcevier.36,(2010);1245-1251

Abstract: Controlling of spin wave propagation in a 1-D Magnonic Antidot Waveguides (MAWs) is studied by introducing the periodic modulation along width of alternative antidots. In the present work, the magnonic band gaps are tuned by varying the width of alternative antidot in magnonic waveguide. The allowed band and forbidden bands are formed because of constructive and destructive interference between initial spin wave mode and higher excited quantized spin wave mode. The frequencies of the spin waves are in the order of microwave regime paves the way for building novel magnonic devices in mere future as well as quite applicable in the microwave communications.

KEYWORDS: Magnonics,Magnonic band gap, MAWs, Spin Wave

[1]. Sang-Koog Kim, Micromagnetic computer simulations of spin waves in nanometre-scale patterned magnetic elements,Journal of Physics D:Applied Physics, 264004,2010, 25pp
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[4]. Qi Wang , Zhiyong Zhong , Lichuan Jin , Xiaoli Tang , Feiming Bai , Huaiwu Zhang ,Geoffrey and S.D. Beach, Design of nanostrip magnonic crystal waveguides with a single magnonic band gap, Journal of Magnetism and Magnetic Materials 340, 2013, 23–26
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Abstract: Cobalt doped Tin Oxide nanoparticles (Sn1-xCoxO2, x = 0.01 – 0.04) are synthesized by microwave assisted solvothermal method. The as prepared samples are annealed with 550 °C for 1 h. The XRD pattern shows that the particles are in tetragonal crystalline structure and there is no secondary phase. The particle sizes are calculated as 14 – 19 nm. TEM images and the SAED pattern reveal the crystalline nature of the samples and confirm the particle size from XRD results. From the UV-Vis spectroscopy it has found out that the optical band gap of the samples increases with the dopant ratio. The functional group analysis made from FTIR spectrum.

KEYWORDS: Co doped SnO2, Microwave assisted synthesis, Optical properties, SnO2 nanoparticles, Structural properties

[1]. Aditya Sharma, Abhinav Pratap Singh, P. Thakur, N. B. Brookes, Shalendra Kumar, Structural, electronic, and magnetic properties of Co doped SnO2 nanoparticles, Journal of Applied Physics. 107, 2010, 093918.
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[5]. Bouaine, A., Brihi, N., Schmerber, G., Ulhaq-Bouillet, C., Colis, S. and Dinia, A., Structural, optical, and magnetic properties of Co-doped SnO2 powders synthesized by the co precipitation technique, The Journal of Physical Chemistry C, 111(7), 2007, 2924-2928.

Abstract: The proposed project work is to synthesis SnO2 nanoparticles by microwave assisted hydrothermal method. We have used two solvents to synthesis SnO2 nanoparticles and comparing the structural and optical characteristics. The prepared samples are annealed with 250,500 and 750 for one hour. The structural parameters are studied using XRD spectrum. The optical characterizations are performed using FTIR spectroscopy and UV-Vis spectroscopy. The band gap values of the samples are calculated using tauc plot.

KEYWORDS: Tin oxide, XRD, UV-VIS, FTIR

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Abstract: Single crystals of pure and nickel doped ninhydrin were grown by slow evaporation method. Structural characterizations of the grown crystals were carried out by powder crystal X-ray diffraction method. The functional groups were identified by Fourier transform infrared spectroscopy. The percentage of transmittance of the crystal was recorded using the UV-Visible Spectrophotometer. The presence of nickel in the doped crystal was confirmed by Energy Dispersive X-ray analysis. The mechanical strength of the crystal was found out using Vickers micro hardness test. The second harmonic generation efficiency was measured by powder Kurtz method.

KEYWORDS: FTIR analysis, Mechanical properties, Organic crystals, SHG test, X-ray diffraction.

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Abstract: Semi Organic Potassium Hydrogen Phthalate single crystal with amino acid L-Phenylalanine as a dopant was grown by slow evaporation technique. The grown crystals were subjected to powder XRD analysis, and the result confirms that the crystals were belongs to orthorhombic structure. The Fourier Transform Infrared Spectroscopy study confirms the incorporation of L-Phenylalanine in to Potassium Hydrogen Phthalate crystal. The optical transparency of the grown crystal was studied by UV-Visible spectrophotometer. Mechanical strength of the grown crystal was estimated by Vickers hardness Test. The dielectric constant and dielectric loss has been studied as a function of frequency for the doped crystals..............

KEYWORDS: Dielectric studies, Infrared spectroscopy, Micro hardness; Optical transmittance studies, X-ray diffraction

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Abstract: NLO materials have a nonlinear response to the electric field of the light of a laser beam. Most of the amino acids are NLO materials that find application in field of optical communication, information technology, signal processing and industrial applications. The NLO active material such as L-alanine is mixed with ammonium sulphate to form novel NLO material for the first time. Ammonium sulphate admixtured L-alanine crystals (LAAS) were grown successfully by solution method with slow evaporation technique at room temperature. The grown crystals were colorless and transparent. The solubility of the grown samples has been found out at various temperatures.............

KEYWORDS: Crystal growth; NLO; SHG; microhardness; Thermal

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