Prof. C.N.R. Rao's Publications: Recent submissions

Now showing items 361-380 of 892

Dominant role of the Cu-O charge-transfer energy, electronic polarizability and associated factors in the superconductivity of cuprates

Rao, C N R; Ramasesha, S; Sarma, D D; Santra, A K (Pergamon-Elsevier Science Ltd, 1991-03)

Although it is believed that there is strong hybridization between the Cu(3d) and O(2p) orbitals in the layered cuprates and that the parent compounds such as La2CuO4 are charge-transfer gap insulators, very few models ...
Hydrothermal Synthesis And Structure Of Organically Templated One-Dimensional And Three-Dimensional Iron Fluorophosphate

Choudhury, A; Rao, C N R (Springer, 2002-08)

Two new open‐framework iron fluorophosphates, [C4N2H12]0.5[FeF(HPO4)(H2PO4)] (I) [C4N2H12][Fe4F2(H2O)4(PO4)4] · 0.5H2O (II), were synthesized hydrothermally using piperazine as a templating agent. The structures were ...
Investigations of carbon nanotubes

Seshadri, Ram; Govindaraj, A; Aiyer, Hemanthkumar N; Sen, Rahul; Subbanna, G N; Raju, A R; Rao, C N R (Current Science Association, 1994-06-10)

Experiments have been carried out to optimize the yields of carbon nanotubes obtained by the arc-evaporation of graphite. Other types of carbon particles such as nanocrystalline graphite usually present along with the ...
Jean Rouxel - An obituary

Rao, C N R (Current Science Association, 1998-08)
An investigation of the Cu/ZnO/Zn system: evidence for the formation of Cu-Zn alloys by the inward diffusion of Cu

Harikumar, K R; Santra, A K; Rao, C N R (Elsevier Science BV, 1996-02)

Cu deposited on 5 or 10 Å thick ZnO layers (grown on Zn metal), has been investigated as a function of Cu coverage by employing X-ray photoelectron and Auger electron spectroscopies. The 2p core-level binding energy of Cu ...
A MAS NMR investigation of aluminosilicate, silicophosphate, and aluminosilicophosphate gels and the evolution of crystalline structures on heating the gels

Prabakar, S; Rao, K J; Rao, C N R (Materials Research Society, 1991-03)

Gels of various composition containing SiO2, Al2O3, and P2O5 have been investigated by employing high resolution magic-angle-spinning (MAS) 27Al, 29Si, and 31P NMR spectroscopy. Changes occurring in the NMR spectra as the ...
A Stabilized Tetragonal Phase of La2O3 in the La-Pd-O System

Row, T N Guru; Ganguli, A K; Rangavittal, N; Seshadri, Ram; Rao, C N R (Academic Press Inc, 1991-11)

Based on an X-ray diffraction study, it is shown that the product of the reaction between PdCl2 and La2O3 in air or of the thermal decomposition of mixed La and Pd nitrates contains, besides some PdO, a novel tetragonal ...
Giant magnetoresistance and related properties of rare earth manganates and related systems

Mahesh, R; Mahendiran, R; Raychaudhuri, A K; Rao, C N R (Elsevier Science BV, 1997-11)

Rare earth manganates of the formula Ln(1-x)A(x)MnO(3) become ferromagnetic and undergo an insulator-metal transition around the Curie temperature, Tc, when the Mn4+ content is around 30%. These materials also show GMR ...
X-ray Photoelectron Spectroscopic Investigations of Cu-Ni, Au-Ag, Ni-Pd, and Cu-Pd Bimetallic Clusters

Harikumar, K R; Ghosh, S; Rao, C N R (American Chemical Society, 1997-01-23)

Core-level binding energies of the component metals in bimetallic clusters of various compositions in the Ni−Cu, Au−Ag, Ni−Pd, and Cu−Pd systems have been measured as functions of coverage or cluster size, after having ...
Erratum - Orientational disorder and other aspects of C70 and C60 - C70 films deposited on single-crystal substrates

Aiyer, Hemantkumar N; Govindaraj, A; Rao, C N R (Taylor & Francis Ltd, 1996-03)
Giant Magnetoresistance, Charge-Ordering, and Related Aspects of Manganates and Other Oxide Systems

Rao, C N R; Cheetham, Anthony K (WILEY-VCH Verlag GmbH, 1997-11-03)

Review: Giant magnetoresistance, and spin-, charge-, and orbital-ordering are some of the properties displayed by manganates that make these materials of interest in magnetic recording, sensor, and actuator technology. New ...
Resistivity, Giant Magnetoresistance And Thermopower In La0.7Sr0.3Mno3 Showing A Large Difference In Temperatures Corresponding To The Ferromagnetic Transition And The Insulator-Metal Transition

Mahendiran, R; Mahesh, R; Raychaudhuri, A K; Rao, C N R (Pergamon-Elsevier Science Ltd, 1996-07)

La0.7Sr0.3MnO3 samples prepared by heating the precursor gel at different temperatures in the 873 – 1473 K range show nearly the same ferromagnetic transition temperature (Tc ≈ 392±4 K), but the insulator-metal like ...
Giant magnetoresistance in manganese oxides

Rao, C N R; Mahesh, Rajappan (Current Science Ltd, 1997-02)

Giant magnetoresistance (GMR) was known to occur in metallic bilayers and granular materials. In 1993, GMR was also found to occur in thin films of manganates of the formula Lal(1-x)A(x)MnO(3) (A=alkaline earth metal). ...
Nitrogen-containing carbon nanotubes

Sen, Rahul; Satishkumar, B C; Govindaraj, A; Harikumar, K R; Renganathan, M K; Rao, C N R (Royal Society of Chemistry, 1997-12)

Carbon nanotubes containing small amounts of nitrogen are produced by the pyrolysis of aza-aromatics such as pyridine, methylpyrimidine and triazine over cobalt nanoparticles in an Ar atmosphere; good yields of such nanotubes ...
An investigation of insulating La4BaCu5O12 obtained by the reduction of metallic La4BaCu5O13.1

Rangavittal, N; Subbanna, G N; Row, T N Guru; Rao, C N R (Academic Press Inc JNL Comp Subscriptions, 1995-01)

The structure of insulating La4BaCu5O12 obtained by the reduction of metallic La4BaCu5O13.1 has been studied by using electron microscopy and high-resolution X-ray diffraction data. While La4BaCu5O13.1 (P4/m) has a tetragonal ...
The nature of the charge-ordered state in Y0:5Ca0:5MnO3 with a very small average radius of the A-site cations

Arulraj, Anthony; Gundakaram, R; Biswas, Amlan; Gayathri, N; Raychaudhuri, A K; Rao, C N R (IOP Publishing Ltd, 1998-05-25)

A detailed investigation of Y0.5Ca0.5MnO3 with a very small radius of the A-site cations ([r(A)] approximate to 1.13 Angstrom reveals the occurrence of a charge-ordering transition in the paramagnetic state, at a relatively ...
Tin(II) Oxalates Synthesized in the Presence of Structure-Directing Organic Amines: Members of a Potentially Vast Class of New Open-Framework and Related Materials

Ayyappan, S; Cheetham, A K; Natarajan, S; Rao, C N R (American Chemical Society, 1998-11)

Three new tin(II) oxalate materials, of which one has an open-framework layered structure, have been synthesized hydrothermally in the presence of structure-directing organic amines. Crystal data: oxalate 1, [(CH3)2NH(C ...
Sodalite networks formed by metal squarates

Neeraj, S; Noy, M L; Rao, C N R; Cheetham, A K (Editions Scientifiques Medicales Elsevier, 2002-10)

Sodalite structures have not hitherto been obtained by rational design based on linking of square building units. We have, for the first time, succeeded in synthesizing sodalite networks by making use of squaric acid as ...
Supramolecular hydrogen-bonded structure of a 1 : 2 adduct of melamine with boric acid

Roy, Abhijit; Choudhury, Amitava; Rao, C N R (Elsevier Science BV, 2002-07-01)

Boric acid (B) forms a 2:1 hydrogen-bond adduct, M·2B, with melamine (M), wherein, a finite tetrameric ribbon of boric acid forms hydrogen bonds with the nitrogen donor sites of M. Hydrogen-bonded layers of B and M in the ...
Sulfates of organic diamines: hydrogen-bonded structures and properties

Jayaraman, K; Choudhury, A; Rao, C N R (Éditions Scientifiques Et Médicales Elsevier, 2002-03)

In order to investigate the supramolecular hydrogen-bonded networks and other structural features exhibited by compounds containing an organic cation and an inorganic anion, sulfates of the organic diamines, ethylenediamine ...

Now showing items 361-380 of 892

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