Browsing by Subject "X-ray diffraction"

Combined addition of nano diamond and nano SiO2, an effective method to improve the in-field critical current density of MgB2 superconductor

Rahul, S; Neson Varghese; Vinod, K; Devadas, K M; Syju Thomas; Anees, P; Chattopadhyay, M K; Roy, S B; Syamaprasad, U (Elsevier, 2011)

MgB2 bulk samples added with nano SiO2 and/or nano diamond were prepared by powder-in-sealed-tube (PIST) method and the effects of addition on structural and superconducting properties were studied. X-ray diffraction (XRD) ...

Effect of isovalent substitutions on the microwave dielectric properties of Ca4La6(SiO4)4(PO4)2O2 apatite

Dhanesh, T; Abhilash, P; Sebastian, M T (Elsevier, 2013)

The isovalent substitutions of Sr2+, Pr3+, (GeO4)4− and (VO4)3− in the respective cationic and anionic sites of Ca4La6(SiO4)4(PO4)2O2 have been accomplished. The substitution of Sr2+ for Ca2+ decreases εr and Qu × f but ...

Effect of isovalent substitutions on the microwave dielectric properties of Ca4La6(SiO4)4(PO4)2O2 apatite

Dhanesh Thomas; Pulanchiyodan, Abhilash; Sebastian, Mailadil T (Elsevier, 2012-08-21)

The isovalent substitutions of Sr2+, Pr3+, (GeO4)4 and (VO4)3 in the respective cationic and anionic sites of Ca4La6(SiO4)4(PO4)2O2 have been accomplished. The substitution of Sr2+ for Ca2+ decreases er and Qu f but ...

Effect of ZnO Doping on the Structural and Optical Properties of BaWO4 Thin Films Prepared Using Pulsed Laser Ablation Technique

VENUGOPALAN PILLAI, N; VINODKUMAR, R; GANESAN, V; PETER KOSHY; MAHADEVAN PILLAI, V P (spinger, 2010-12)

BaWO4 doped with ZnO (2, 3, 5, 7 and 10 wt%) nanostructured films are prepared on quartz substrates by pulsed laser ablation. The films are post annealed at 900 ◦ C. GIXRD analysis of the post-annealed films reveal the ...

Electrical transport properties of manganese containing pyrochlore type semiconducting oxides using impedance analyses

Sumi, S; Prabhakar Rao, P; Mahesh, S K; Peter Koshy (Elsevier, 2012)

A new series of manganese containing pyrochlore type semiconducting oxides CaCe1 xMnxSnNbO7 d(x = 0, 0.2, 0.4 and 0.6) have been synthesized to study the effect of Mn substitution on the structure,microstructure and ...

High surface area neodymium phosphate nano particles by modified aqueous sol-gel method

Sankar, S; Warrier, K G K; Rajesh Komban (Elsevier, 2011)

Synthesis of nano rod shaped neodymium phosphate (NdPO(4)) particles with specific surface area as high as 107 m(2)g(-1) and an average length of 50 nm with aspect ratio 5 was achieved using modified sol gel method. ...

Improvement of morphology and luminescence properties of powellite type red phosphors CaGd1 xNbMoO8: xEu3+ synthesized via citrate gel route

Mariyam Thomas; Prabhakar Rao, P; Mahesh, S P K; Reshmi, V R; Linda Francis, T; Peter Koshy (American Ceramic Society, 2012-07)

Powellite type molybdate-based red phosphors CaGd1 xNb-MoO8: xEu3+ (x = 0.05, 0.1, 0.15, 0.20, 0.25, and 0.30) were synthesized by a solid-state reaction (SSR) route, and a citrate gel (CG) route. The crystalline structure, ...

Influence of cobalt on the structural, magnetic and magnetocaloric properties of La0.67Ca0.33MnO3

Nisha, P; Savitha Pillai, S; Manoj Raama Varma; Suresh, K G (Elsevier, 2013)

The critical properties and magnetocaloric effect of perovskite manganite La0.67Ca0.33Mn1-xCoxO3 (x=0.03, 0.1 and 0.15) are investigated. Structural study using Reitveld refinement of X-ray diffraction pattern indicates ...

Influence of dy addition on the magnetocaloric effect of La0.67Ca0.33Mn0.9V0.1O3 ceramics

Nisha, P; Savitha Pillai, S; Suresh, K G; Manoj Raama Varma (Elsevier, 2012-01)

The influence of partial substitution of Laby Dy on the magnetocaloric response of(La1 xDyx)0.67-Ca0.33Mn0.9V0.1O3, where x¼0.03, 0.15and0.25 is studied.Rietveld refinement ofX-ray diffraction pattern using GSAS method ...

Microwave dielectric properties of Ba(Mg1/3Ta((2-2x))(/3)Wx/3Tix/3)O-3 ceramics

Surendran, K P; Mohanan, P; Sebastian, M T (Elsevier, 2006)

The microwave dielectric properties of ceramics based on Ba(Mg1/3Ta(2-2x)/3Wx/3Tix/3)O-3 is investigated as a function of x. The densification as well as dielectric properties deteriorate with increase in the substitution ...

Microwave Dielectrics: Solid Solution, Ordering and Microwave Dielectric Properties of (1−x)Ba(Mg1/3Nb2/3)O3−xBa(Mg1/8Nb3/4)O3 Ceramics

Yogita, B; Richa, T; Abhilash, P; Deepa, R L; Thirumal, M (Indian Academy of Sciences, 2017-10)

The effect of Ba(Mg1/8Nb3/4)O3 phase on structure and dielectric properties of Ba(Mg1/3Nb2/3)O3 was studied by synthesizing (1−x)Ba(Mg1/3Nb2/3)O3−xBa(Mg1/8Nb3/4)O3 (x = 0, 0.005, 0.01 and 0.02) ceramics. Superlattice ...

Near Room Temperature Magneto Caloric Effect in V doped La0.67Ca0.33MnO3 Ceramics

Nisha, P; Santhosh, P N; Suresh, K G; Pavithran, C; Varma, M R (Elsevier, 2009-06-10)

La0.67Ca0.33MnO3 doped with different amounts of V, resulting in the series La0.67Ca0.33Mn1−xVxO3 [x = 0.03, 0.06, 0.1, 0.15, 0.25, 0.5] was synthesized by conventional solid-state ceramics route. Heat treatment conditions ...

Near room temperature magnetocaloric properties of Fe substituted La0.67Sr0.33MnO3

Reshmi, C P; Savitha Pillai, S; Suresh, K G; Manoj Raama Varma (Elsevier, 2013)

The effect of Fe substitution in the polycrystalline La0.67Sr0.33MnO3 has been investigated. Substitution of Fe decreases the Curie temperature of La0.67Sr0.33MnO3 from 370 K to near room temperature in x < 0.3 samples, ...

A novel low temperature synthesis route for SmFeAsO1−xFx bulk superconductor with improved transport properties

Anooja, J B; Aswathy, P M; Sarun, P M; Syamaprasad, U (Elsevier, 2012-02-15)

Polycrystalline bulk samples of SmFeAsO1−xFx with 0 ≤x≤0.4 are synthesized at a temperature as low as 850 ◦C using a partially reacted precursor. The temperature dependence of resistivity and ac susceptibility measurements ...

Novel nontoxic nanopigments based on zirconia and rare earth mixed oxides

Chandini Sam, S P; Prasad, V S; Kumar, K S (Wiley, 2010)

This paper embodies the result of the investigations carried out on the synthesis of zirconia- rare earth mixed oxide pigments: ZrCe(1-x)Y(x)O(4-delta) and ZrCe(1-x)Pr(x)O(4-delta) by the solution combustion method and ...

The role of Yttrium doping on the structural and superconducting properties of Sm1111 and its comparison with other (RE, Y)1111 (RE La, Ce, and Nd) Iron Oxypnictides

Aswathy, P M; Anooja, J B; Neson Varghese; Syamaprasad, U (Springer/ Plenum Publishers, 2015)

The role of yttrium doping on the structural and superconducting properties of SmFeAsOF (Sm1111) is studied in detail and is compared with other yttrium-doped RE1111 (RE-rare earth) iron oxypnictide superconductors on the ...

Room temperature synthesis of high temperature stable lanthanum phosphate–yttria nano composite

Sankar, S; Athira Raj, N; Jyothi, C K; Warrier, K G K; Padmanabhan, P V A (Elsevier, 2012-07)

A facile aqueous sol–gel route involving precipitation–peptization mechanism followed by electrostatic stabilization is used for synthesizing nanocrystalline composite containing lanthanum phosphate and yttria. Lanthanum ...

Structural and superconducting properties of neodymium added (Bi,Pb)(2)Sr2CaCu2Oy

Biju, A; Sarun, P M; Aloysius, R P; Syamaprasad, U (Elsevier, 2007)

The effects of neodymium (Nd) addition on the phase evolution, structural and superconducting properties of (Bi,Pb)(2)Sr2CaCu2Oy [(Bi,Pb)-2212] prepared by solid state synthesis in bulk polycrystalline form were studied. ...

Studies on structural, microstructural and electrical properties of cerium based high temperature semiconducting complex oxides

Deepa, M (Materials and Minerals Division, National Institute for Interdisciplinary Science and Technology(CSIR), Thiruvananthapuram., 2010)

Studies on suppression of flux creep and scaling of vortex liquid resistivity in rare earth modified (Bi,Pb)-2212 superconductors

Vinu, S; Syamaprasad, U (Applied Superconductivity and Ceramics Group Materials and Minerals Division, National Institute for Interdisciplinary Science and Technology(CSIR),Thiruvananthapuram, 2011)

Browsing by Subject "X-ray diffraction"

Browsing by Subject "X-ray diffraction"

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