Synthesis and crystal growth

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Growth of large La2-xSrxNiO4+delta single crystals by the floating-zone technique

J CRYST GROWTH 237 (2002) 815-819

Authors:

D Prabhakaran, P Isla, AT Boothroyd

Abstract:

We report on an investigation into the growth of large, high-quality single crystals of La2-xSrxNiO4+ (x = 0-0.5) by the floating zone technique. The results of attempts to grow crystals in different atmospheres are discussed. The oxygen non-stoichiometry (delta) of the as-grown crystals is found to decrease with the Sr substitution level. Magnetic and electrical transport measurements on the crystals are reported. (C) 2002 Elsevier Science B.V. All rights reserved.
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Texturing studies on Sm substituted Bi-2212 high Tc superconductor grown by floating zone technique

Physica C Superconductivity and Its Applications 341-348:PART 1 (2000) 659-660

Authors:

S Uthayakumar, E Srinivasan, DP Paul, D Prabhakaran, R Jayavel, C Subramanian, P Ramasamy

Abstract:

The present work investigates the texturing and superconducting properties of Sm substituted Bi2Sr2CaCu2O8+δ (Bi-2212) crystals grown by the floating zone technique. The texturing nature of Bi-2212 was quantified by Xray diffraction and by scanning electron microscopic studies. The texturing nature varies with respect to the 'Sm' concentration. Superconductivity studies were carried out by the resistivity technique and the transition temperature increases from 78K to 85K (for x=0.2) and decreases for higher concentration. The c-lattice parameter decreases with Sm substitution. © 2000 Elsevier Science B.V All rights reserved.
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Morphology and etching studies on YBCO and CuO single crystals

Physica C: Superconductivity and its Applications Elsevier 319:1-2 (1999) 99-103

Authors:

D Prabhakaran, C Subramanian, S Balakumar, P Ramasamy
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Synthesis of Bi-2223 phase using different precursors through different routes and their characterisation

Materials Science and Engineering B Elsevier 58:3 (1999) 199-205

Authors:

D Prabhakaran, C Subramanian, P Ramasamy
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Texturing studies on bulk crystals

Superconductor Science and Technology IOP Publishing 11:8 (1998) 788

Authors:

D Prabhakaran, C Subramanian
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