SUPERCONDUCTIVITY AND VALENCE STATE OF TB IN LU1-XTBXBA2CU3O7-DELTA (0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.7)
DSpace at IIT Bombay
View Archive InfoField | Value | |
Title |
SUPERCONDUCTIVITY AND VALENCE STATE OF TB IN LU1-XTBXBA2CU3O7-DELTA (0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.7)
|
|
Creator |
GNANASEKAR, KI
SELVAM, P KEER, HV PINTO, R PURANDARE, SC TAMHANE, AS GUPTA, LC VIJAYARAGHAVAN, R |
|
Subject |
thin-films
pr yba2cu3o7 y1-xprxba2cu3o7-delta prba2cu3o7 systems |
|
Description |
Although both lutetium and terbium do not form superconducting REBa2Cu3O7-delta, we report here the formation of superconducting phase in thin films. Films are highly c-axis oriented with high current densities (3.0x10(6) A cm-2 at 77 K) observed in Lu0.5Tb0.5Ba2Cu3O7-delta. X-ray photoelectron spectroscopic analysis of Tb in the above film indicates that Tb is in a trivalent state. Further, as the redox potential of Tb (Tb4+ +e- --> Tb3+:E0 = 3.1 V) is close to that of Pr (Pr4+ +e- -->Pr3+:E0 = 3.2 V), we suggest that Pr also would be in a trivalent state and the mechanism by which the latter depresses T(c) must be of trivalent origin.
|
|
Publisher |
AMER INST PHYSICS
|
|
Date |
2011-07-16T16:59:19Z
2011-12-26T12:49:51Z 2011-12-27T05:35:37Z 2011-07-16T16:59:19Z 2011-12-26T12:49:51Z 2011-12-27T05:35:37Z 1994 |
|
Type |
Article
|
|
Identifier |
APPLIED PHYSICS LETTERS, 65(10), 1296-1298
0003-6951 http://dx.doi.org/10.1063/1.112099 http://dspace.library.iitb.ac.in/xmlui/handle/10054/4472 http://hdl.handle.net/10054/4472 |
|
Language |
en
|
|