Výsledky vyhledávání - "K. C. Nagpal"

Microstructures and the role of Pb in doped Bisrcacuo superconductor

Autor: R.G. Sharma, S. U. M. Rao, P.L. Upadhyay, K C Nagpal

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ac0de5ea59337b98b22b68b82067dd80
https://doi.org/10.1016/0025-5408(92)90048-5

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Transformation of 2212 to 2223 phase in the Bi-Sr-Ca-Cu-O system

Autor: Mukul Sharma, D.K. Suri, R. B. Tripathi, K. C. Nagpal, G.K. Padam, S. U. M. Rao, B. K. Das

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::117c86c930e8e5ca85dcbe1070f04ea4
https://doi.org/10.1016/0038-1098(91)90022-n

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Study of Josephson effects in microbridges of Bi-Sr-Ca-Cu-O films made by spray pyrolysis

Autor: A.K. Gupta, D K Walia, K C Nagpal, V S Tomar, Neeraj Khare, G S N Reddy, N D Kataria, V N Ojha

Publikováno v: Bulletin of Materials Science. 14:1119-1123

Superconducting Bi-Sr-Ca-Cu-O (2212) films were prepared by spraying stoichiometric aqueous solutions of nitrates of bismuth, strontium, calcium and copper on heated MgO (100) substrates and subsequent annealing in air. TheR-T curves of the films sho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c3391482847ba3b434931670a9ea6827
https://doi.org/10.1007/bf02747490

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Reversible threshold switching in the Zn-doped selenium and tellurium system

Autor: D R Sharma, S Kumar, K C Nagpal

Publikováno v: Journal of Physics D: Applied Physics. 24:608-611

Threshold switching in bulk amorphous samples of (Se0.7Te0.3)100-xZnx has been studied experimentally. It is observed that above a certain voltage across the sample the current through the material rises to a very high value without any increase in t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c5b873d391abe77c32a1390feb2a2d6
https://doi.org/10.1088/0022-3727/24/4/012

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Growth of highT c Bi-Sr-Ca-Cu-O thick films

Autor: G S N Reddy, V N Ojha, V S Tomar, Anil K. Gupta, Sangeeta Chaudhry, K C Nagpal, Neeraj Khare

Publikováno v: Bulletin of Materials Science. 14:521-524

Thick films of Bi-Sr-Ca-Cu-O were deposited on (100) MgO substrates by screen-printing technique with the starting composition 1112. To attain the superconducting state, the films were subjected to two-step heat-treatment. R-T and XRD have been studi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::742fbcbcc95f49339b99c12b3e423030
https://doi.org/10.1007/bf02747367

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Lead-doped electron-beam-deposited BiSrCaCuO superconducting thin films

Autor: S.A. Agnihotry, Subhas Chandra, K. C. Nagpal, Chhemendra Sharma, Pawas Asthana, S.N. Ekbote, Chander Kant, K.K. Saini

Publikováno v: Thin Solid Films. 198:233-240

Superconducting thin films of the lead-doped BiSrCaCuO system have been prepared on (100) single-crystal SrTiO 3 substrates by an electron beam deposition technique using a single sintered pellet as the evaporation source. As-deposited fi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e2cad8c48bbeb56fb68c781ba3d86cf0
https://doi.org/10.1016/0040-6090(91)90342-u

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The Effect of Long Annealing on Pb-Doped High-Tc BiSrCaCuO Systems

Autor: Chhemendra Sharma, Subhas Chandra, S.A. Agnihotry, Chanderkant, K.K. Saini, K. C. Nagpal, S.N. Ekbote, Pavas Asthana

Publikováno v: Physica Status Solidi (a). 123:269-274

The lead doped Bi based copper oxide high-Tc superconductors with different nominal compositions and with different annealing time periods are studied. The highest Tc (zero) achieved is 112 K in bulk phase 2223. The varying intensity of the low angle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7ab4bde91e3feab50c10a0ec1b5c4d89
https://doi.org/10.1002/pssa.2211230127

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Investigation of Renal Calculi as Piezoelectric Materials by Using X-ray Diffraction Technique

Autor: K. C. Nagpal, S. P. Sud, Urmila Dhawan, Ved Singh, Ravinder Agarwal, V. R. Singh

Publikováno v: Bio-Medical Materials and Engineering. 1:149-154

The renal calculi are studied by using an X-ray diffractometer for different chemical composition of the stones. A new constituent, alpha-quartz, is confirmed to be present in the renal calculi which is responsible for piezoelectric property of such

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aca93e01fd82099ef8c661fe915485c4
https://doi.org/10.3233/bme-1991-1302

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Enhancement of Tcon, appearance of a 'new phase' and faster kinetics in Pb+Sb doped Bi2Sr2Ca2Cu3Oy

Autor: S A Agnihotry, S Chandra, P Ghosal, K C Nagpal

Publikováno v: Superconductor Science and Technology. 4:7-12

In an attempt to increase the volume fraction of the high Tc phase Bi2Sr2Ca2Cu3Oy(2223), mixed doping of Pb+Sb was performed in a Bi superconducting system. A stoichiometric starting composition with Bi partially replaced by Sb+Pb was found to result

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f36fd0096deb52a27e3db942f89ef6bf
https://doi.org/10.1088/0953-2048/4/1/003

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