C N R Rao
Articles written in Pramana – Journal of Physics
Volume 1 Issue 1 July 1973 pp 48-52 Solids
Hydrostatic pressure has negligible effect on the resistivity anomaly and the
Volume 5 Issue 5 November 1975 pp 274-283 Solids
Lattice imaging technique of high resolution electron microscopy has been employed to examine 4H, 6H and 9R ABO3 perovskite polytypes. The lattice images can be correlated with the lattice periodicity and the stacking sequence of AO3 layers and BO6 octahedra. The study shows the utility and validity of the lattice imaging technique for the study of relatively close-packed systems.
Volume 12 Issue 4 April 1979 pp 317-329 Solids
X-ray and ultraviolet photoelectron spectroscopy as well as x-ray absorption spectroscopy have been employed to investigate transition metal oxide perovskites of the general formula ABO3 (A = La or rare-earth ion, B=trivalent transition metal ion). Systematics in the core levels and in the valence bands in the series of LaBO3 compounds have been discussed. Lanthanum chemical shifts in the x-ray absorption spectra in this series show interesting trends. Photoelectron spectra of the solid solutions, LaNi1−
Volume 23 Issue 6 December 1984 pp 815-818 Letter
L3VV Auger transitions of copper alloys show a feature due to a band-like states, the shape and intensity of which depend on the composition. The energy separation between this feature and the L3M4·5M4·5 peak increases progressively with Cu concentration.
Volume 24 Issue 1-2 January 1985 pp 293-310 Atomic And Molecular Physics
An indigenous electron energy loss spectrometer has been designed and fabricated for the study of free molecules. The spectrometer enables the recording of low-resolution electronic spectra of molecules in the vapour phase with ready access to the vacuum ultraviolet region. Electron energy loss spectra of aliphatic alcohols and carbonyl compounds as well as of benzene derivatives have been recorded with the indigenous spectrometer and the electronic transitions in these molecules discussed.
Volume 28 Issue 2 February 1987 pp 1- Rapid Communication
Oxides of the Y-Ba-Cu-O system are found to show onset of superconductivity in the 100–120 K region.
Volume 28 Issue 3 March 1987 pp 1- Rapid Communications
The oxide responsible for high-temperature superconductivity (onset ∼100 K, zero resistance above liquid N2 temperature) is found to be YBa2Cu3O7±δ.
Volume 28 Issue 5 May 1987 pp 605-605 Erratum
Volume 29 Issue 3 September 1987 pp 1- Rapid Communications
Superconductivity is found in tetragonal La3−
Volume 30 Issue 5 May 1988 pp 1- Rapid Communications
Some of the Bi-Ca-Sr-Cu-O compositions show indications of onset of superconductivity in the 200–300 K region, possibly due to the intergrowth of different layered sequences.
Volume 32 Issue 2 February 1989 pp 1- Rapid Communications
Likely presence of superconductivity in layered nickelates of K2NiF4 structure is pointed out.
Volume 44 Issue 4 April 1995 pp 1- Rapid Communication
Magnetoresistance (MR) in bulk samples of LaMnO3 has been investigated by varying the Mn4+ content from 10 to 33 per cent by chemical means, without aliovalent doping. With the increase in Mn4+ content, the structure of LaMnO3 changes first from orthorhombic to rhombohedral and then to cubic and the material becomes increasingly ferromagnetic, exhibiting a resistivity maximum akin to an insulator-metal transition at
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