Jin, Mingji, Chen, Ping, Boolchand, P., Rajagopalan, T., Chopra, K. L., Starbova, K., ...
Obliquely deposited amorphous Ge_xSe{1-x} thin-films at several compositions in the 0.15 < x < 0.333 range, and at several obliqueness angles in the 0 < alpha < 80 range at each x were evaporated on...
Synthesis and sintering characteristics of Y–Ba–Cu-oxide superconductors (2004)
Pathak, L C, Mishra, Suman K, Bhattacharya, D, Chopra, K L
Y–Ba–Cu-Oxide (YBCO) powder were prepared by three different techniques and the isothermal sintering characteristics of the synthesized powder were systematically investigated using a...
Synthesis and sintering characteristics of Y–Ba–Cu-oxide superconductors (2004)
Pathak, L C, Mishra, S K, Bhattacharya, D, Chopra, K L
Y–Ba–Cu-Oxide (YBCO) powder were prepared by three different techniques and the isothermal sintering characteristics of the synthesized powder were systematically investigated using a...
Effect of sintering atmosphere on the weak-link behaviour of YBCO superconductors (2001)
Pathak, L C, Mishra, S K, Das, S K, Bhattacharya, D, Chopra, K L
Weak-link behaviour of YBa2Cu3Ox (1 2 3) superconductors sintered in different atmospheres are studied by measuring the variation of critical current densities (Jc) near the superconducting...
Koner, P K, Dutta, V, Chopra, K L
Comparative life cycle energy cost analysis for different electricity generators (photovoltaic generator, kerosene generator and diesel generator) used during load shedding is presented. The...
Kar, A K, Dhar, A, Ray, S K, Mathur, B K, Bhattacharya, D, Chopra, K L
Thin films of La0.67Ca0.33MnO3 have been deposited at room temperature on LaAlO3(100) substrates by dc magnetron sputtering. The as-deposited films are amorphous and become polycrystalline on...
Effects of Nitrogen Ion Implantation in 304 Stainless Steel at High Temperatures. (1998)
Shrivastava, Sadhna, Tarey, Ram D., Bhatnager, M. C., Jain, Amitabh, Chopra, K. L.
THE EFFECT OF VARYING THE TARGET TEMPERATURE (BY CHANGING THE BEAM POWER) ON THE STRUCTURE AND PROPERTIES OF NITROGEN ION IMPLANTED 304 STAINLESS STEEL WAS STUDIED; WITH A BEAM POWER OF 0.1 W/SQ.CM...
Shrivastava, Sadhna, Tarey, Ram D., Bhatnagar, M. C., Jain, Amitabh, Chopra, K. L.
Nitrogen ion implantation has proved effective in the surface strengthening of metals and alloys. In order to achieve high throughputs industrially, high beam currents must be used. The resulting...
Magnetic and Microstructural Properties of YBa2Cu3O7-x-Ag Composite. (1998)
Sen, D., Bhattacharya, D., Ghatak, S. K., Chopra, K. L.
This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, composite materials, mmc materials and material types:, ag...
Excess Electrical Conductivity and Thermoelectric Power of (YBa2Cu(3.05)O(x))Ag(n) Pellets. (1998)
Dey, T. K., Radha, K., Barik, H. K., Bhattacharya, D., Chopra, K. L.
Kosterlitz-Thouless transition and fluctuation effects in YBa2Cu3O7−x thin films (1994)
Chaudhary, Sujeet, Gogia, Balvinder, Singh, Kanwal Jeet, Kashyap, S C, Pandya, D K, Chopra, K L
Fluctuation effects and temperature dependance of IV characteristics of c-axis oriented YBCO thin films on STO(100) have been investigated within the context of unbinding of vortex-antivortex pairs...
Rastogi, R S, Vankar, V D, Chopra, K L
Thin films of MoSix (with and without oxygen) were deposited by co-sputtering of molybdenum and silicon targets. As-deposited films were annealed in argon environment in the temperature range...
Effect of humid atmosphere on the stability of superconducting phases of BSCCO system (1991)
Gogia, Balvinder, Kashyap, S C, Pandya, D K, Chopra, K L
A systematic study of the effect of humid atmosphere on the stability of various phases of BSCCO system is reported. Samples exhibiting single 2223 phase were found to be insensitive to humid...
Interaction of Mo/Ni and Mo/Co bilayer structures with silicon (1991)
Rastogi, R S, Vankar, V D, Chopra, K L
The thin film interaction of Mo/Ni and Mo/Co bilayer structures was investigated in the temperature range 500–650 °C by Auger electron spectroscopy and glancing angle X-ray diffraction. It was...
Surface analysis of a black copper selective coating (1991)
Bhatnagar, M C, Richharia, Purnima, Chopra, K L
This paper presents the surface analysis of a black copper selective coating using AES and XPS techniques. This study indicates that the textured black copper selective coating is a multiphase...
Etching of crystalline and amorphous silicon in CClF3 plasma (1991)
Agrawal, Neeta, Tarey, R D, Chopra, K L
Plasma etching of crystalline and hydrogenated amorphous silicon has been studied in CClF3 gas as a function of pressure and power using a 30 kHz parallel plate plasma-etching system. In contrast to...
Amorphous silicon as a resist material (1988)
Lithographic properties of amorphous silicon films exposed to glow-discharge hydrogen plasma and ion beams have been investigated. The rate of film etching by a CF4 plasma is lowered by exposure,...