U V Varadaraju
Articles written in Bulletin of Materials Science
Volume 10 Issue 3 May 1988 pp 1-
Thick films of the high
Volume 12 Issue 1 March 1989 pp 63-80
The oxygen-deficient phase of the high
Volume 12 Issue 1 March 1989 pp 81-93
The effect of oxide additives-CuO, SiO2, Y2O3, Bi2O3 and ZnO in 1–10 mol% on the sintering and superconducting properties of YBa2Cu3O7 was studied. SEM studies indicated improvement of grain size and interconnectivity due to the additives, the best results being obtained with Bi2O3, SiO2 and Y2O3. The superconducting transition temperature is unaffected (92±2 K) even with 10 mol % of the additives. ZnO, however, decreases the
Volume 14 Issue 2 April 1991 pp 315-320 International Conference On Superconductivity—I
The layer-type compound, Ca0·85Sr0·15CuO2, which is the prototype of the cuprate family of high
Volume 14 Issue 2 April 1991 pp 321-325 International Conference On Superconductivity—I
Superconductivity with a maximum
Volume 17 Issue 6 November 1994 pp 615-624
We have carried out studies on the effect of oxide additives (Ca0·85Sr0·15CuO2, BaBiO3 and BaPbO3) on Bi-2212. Compositions up to 6 mole% of all the additives have been prepared and characterized by XRD, resistivity and ac susceptibility techniques. XRD studies indicate that all the materials are single phase. Resistivity and ac susceptibility studies indicate enhanced granular behaviour with the oxide additives. Low temperature (400°) sintering results in degradation of the Bi-2212 phase in the presence of the additives.
Volume 17 Issue 6 November 1994 pp 959-965
The photoelectrochemical behaviour of oxide bronzes of the type A6Nb8Ti2O30 (A = Ba. Sr) has been studied. They show good photoactivity with photopotentials of the order of 700–800 mV. The flat band potential has been estimated to be − 0·9 V vs SCE. The band gap estimated from the spectral response is 3·1 eV.
Volume 22 Issue 3 May 1999 pp 509-517 Magnetic Materials And Related Phenomena
The structural and magnetic properties of 2 : 17 compounds, their nitrides and carbides and the recent development of the novel 3 : 29 compounds are discussed.
Volume 42 | Issue 6
Click here for Editorial Note on CAP Mode