Zobrazeno 1 - 10
of 16
pro vyhledávání: '"S. U. M. Rao"'
Publikováno v:
Materials Research Bulletin. 27:109-116
It is widely being accepted that Pb-addition enhances the stability and promotes single-phase formation of the high T c (2223) phase in the Bi-family of cuprate superconductors, and yet, the exact mechanism by which it takes place remains a subject t
Publikováno v:
Scopus-Elsevier
Single phase Bi2Sr2Ca1Cu2O8 (2 2 1 2) superconductor with T°c around 85 K was transformed to nearly a single phase Bi2Sr2Ca2Cu3O10 (2223) having T°c around 115.5 K by reacting at 860°C with CaO and CuO (1 mol each of CaO and CuO, per formula compo
Autor:
Kanika Nagpal, B. K. Das, Indu Dhingra, R. B. Tripathi, Shubra Singh, S. U. M. Rao, Deepti Suri, G.K. Padam
Publikováno v:
Journal of Applied Physics. 70:1575-1579
A study of the effect on the superconducting and microstructural properties of YBa2Cu3O7−x screen printed thick films as a function of silver content (in the form of Ag and Ag2O) from 0 to 40 wt. % by employing different experimental techniques has
Autor:
Kanika Nagpal, R. B. Tripathi, S. U. M. Rao, B. K. Das, G.K. Padam, Indu Dhingra, Deepti Suri, V Raman
Publikováno v:
Journal of Physics: Condensed Matter. 3:4269-4279
Oxide superconductors in the Y-Ba-Cu-O and Bi(Pb)-Sr-Ca-Cu-O systems with Tc degrees of 93.6 K and 115 K, respectively, have been prepared by the co-precipitation process via the oxine route using nitrates as the starting materials. Chemical homogene
Publikováno v:
Materials Research Bulletin. 25:1057-1063
In processing oxide superconductors it is important to obtain the highest possible density without having adverse effect on the electric and magnetic properties of the material. The present study reports some of the systematic results on densificatio
Autor:
G.K. Padam, R. C. Goel, S.M. Khullar, R.K. Kotnala, B. S. Khurana, R. B. Tripathi, B. K. Das, Kiran Jain, S. U. M. Rao, S.N. Singh
Publikováno v:
Journal of Applied Physics. 67:371-375
Tungsten‐doped YBa2Cu3O7−x superconducting samples are characterized with the help of resistivity, crystal structural, microstructural, density d, and critical current density Jc studies for doping concentrations varying from 0.00 to 0.14 mol % o
Autor:
Sudhir Kumar Sharma, B. R. Chakravarty, B. C. Chakravarty, S. U. M. Rao, Ravi Kumar, B. K. Das, S.N. Singh
Publikováno v:
Journal of Materials Science Letters. 12:447-448
Autor:
S U M Rao
Publikováno v:
IETE Technical Review. 9:256-257
Laboratory and field exposure studies, under different environmental and operational stresses, are carried out to evaluate the life of electronic components. Fixed resistors (carbon film, metal oxide and metal film type) have been used for investigat
Publikováno v:
Japanese Journal of Applied Physics. 29:L576
High T c superconductors of the nominal composition of Bi1.6Pb0.4Sr2Ca2Cu3O y were successfully prepared by the conventional ceramic technique. The high T c phase was predominant in all the samples giving zero resistance at 104 K. Drastic changes in
Publikováno v:
Journal of Applied Physics. 63:770-774
Structural, optical, and electrical properties of thin films of ZnxCd1−xS (0≤x≤1.0) prepared by the solution‐growth technique are reported as a function of x. As‐grown films are composed of a hexagonal phase in the range 0≤x≤0.8 and of