Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Radhakrishnan, T. S."'
Autor:
Lakshmi, L. Seetha, Sridharan, V., Natarajan, D. V., Rawat, Rajeev, Chandra, Sharat, Sastry, V. Sankara, Radhakrishnan, T. S.
This paper is in continuation of our previous work on the structural, electrical and magnetic properties of Ru doped La(0.67)Ca(0.33)MnO(3) compounds (Ref.: L.Seetha Lakshmi et.al, J. Magn. Magn. Mater. 257, 195 (2003)). Here we report the results of
Externí odkaz:
http://arxiv.org/abs/cond-mat/0308030
Autor:
Lakshmi, L. Seetha, Sridharan, V., Natarajan, D. V., Sastry, V. Sankara, Radhakrishnan, T. S.
We discuss here a comparative study of the role of local structure and/or nature of local magnetic coupling on the electrical transport properties of Mn site substituted La-Ca-Mn-O perovskites. Particular emphasis is being paid to explore the strong
Externí odkaz:
http://arxiv.org/abs/cond-mat/0303378
Autor:
Janaki, J., Kumary, T. Geetha, Nagarajan, R., Mary, T. A., Valsakumar, M. C., Sastry, V. S., Hariharan, Y., Radhakrishnan, T. S.
Publikováno v:
Materials Chemistry and Physics 75 (2002) 110-116
In order to explore the possibility of tuning superconducting and ferromagnetic transitions by Cu doping (for Ru) in GdSr2RuCu2O8, we have carried out synthesis and characterization of GdSr2Ru{1-x}Cu{2+x)O8 (x = 0, 0.05, 0.1, 0.2) and studied their p
Externí odkaz:
http://arxiv.org/abs/cond-mat/0303287
Autor:
Lakshmi, L. Seetha, Sridharan, V., Natarajan, D. V., Chandra, Sharat, Sastry, V. Sankara, Radhakrishnan, T. S., Pandian, Ponn, Narayanasamy, A.
X-ray diffraction, resistivity, ac susceptibility and magnetization studies on La0.67Ca0.33Mn1-xRuxO3 (0 x < 0.1) were carried out. A significant increase in the lattice parameters indicated the presence of mixed valance state of Ru: Ru3+ and Ru4+. T
Externí odkaz:
http://arxiv.org/abs/cond-mat/0204441
Autor:
Lakshmi, L. Seetha, Sridharan, V., Natarajan, D. V., Sastry, V. Sankara, Radhakrishnan, T. S.
Mn site is substituted with closed shell ions (Al, Ga. Ti, Zr and a certain combination of Zr and Al) and also with Fe and Ru ions carrying the magnetic moment (S=5/2 and 2 respectively) at a fixed concentration of 5 at. %. Substitution did not chang
Externí odkaz:
http://arxiv.org/abs/cond-mat/0203425
Autor:
Kumary, T. Geetha, Janaki, J., Mani, Awadhesh, Jaya, S. Mathi, Sastry, V. S., Hariharan, Y., Radhakrishnan, T. S., Valsakumar, M. C.
Results of our study on the superconducting and normal state properties of the recently discovered superconductor MgCNi_3, the effect of Fe and Co substitution at the Ni site and the effect of pressure are reported. It is shown that a two band model
Externí odkaz:
http://arxiv.org/abs/cond-mat/0202277
Autor:
Bharathi, A., Balaselvi, S. Jemima, Kalavathi, S., Reddy, G. L. N., Sastry, V. Sankara, Hariharan, Y., Radhakrishnan, T. S.
Successful replacement of B by C in the series MgB2-xCx for values of x upto 0.3 are reported. Resistivity and ac susceptibility measurements have been carried out in the samples. Solubility of carbon, inferred from the observed change in the lattice
Externí odkaz:
http://arxiv.org/abs/cond-mat/0202031
Autor:
Sundar, C. S., Bharathi, A., Premila, M., sairam, T. N., Kalavathi, S., Reddy, G. L. N., Sastry, V. S., Hariharan, Y., Radhakrishnan, T. S.
Infrared absorption measurements in the range of 125 to 700 cm^(-1) have been carried out as a function of temperature upto 5 K in MgB2. The absorption spectrum is characterised by a broad band centred at 485 cm^{-1}, with shoulders at 333 and 387 cm
Externí odkaz:
http://arxiv.org/abs/cond-mat/0104354
Publikováno v:
Phys. Rev. B57 (22) R13969 (1998)
We report intermolecular potential-energy calculations for solid C_${70}$ and determine the optimum static orientations of the molecules at low temperature; we find them to be consistent with the monoclinic structural model proposed by us in an earli
Externí odkaz:
http://arxiv.org/abs/cond-mat/9808344
We follow the structural transformation in solid C$_{70}$ from the high temperature hcp to a low temperature monoclinic phase using x-ray diffraction studies at controlled cooling-rates from 0.0033 to 0.42 K/min. Rapid cooling of the sample gives the
Externí odkaz:
http://arxiv.org/abs/cond-mat/9808232