Abstract
A comparative study of the infrared spectra of Nd2Cu1−xAgxO4 and La1.8Sr0.2Cu1−xAgxO4 is reported. It is shown that the appearance of an absorption peak at ∼680 cm−1 is due to local distortions around the Ag impurities, and the appearance of this peak need not imply a structural transformation from Nd2CuO4 type of K2NiF4 type. It is shown that Nd2CuO4 structure is not important for the superconductivity of La-Sr-Cu-O system.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. G. Bednorz and K. A. Muller, Z. Phys. B64 (1986) 189.
D. A. Bonn, J. E. Greedan, C. V. Stager, T. Timusk, M. G. Doss, S. L. Herr, K. Kamaras, C. D. Porter, D. B. Tanner, J. M. Tarascon, W. R. Mckinnon and L. H. Greene, Phys. Rev. B35 (1987) 8843.
P. E. Sulewski, A. J. Sievers, R. A. Buhrman, J. M. Tarascon, L. H. Greene and W. A. Curtin, ibid. B35 (1987) 8829.
Z. Schlesinger, R. L. Greene, J. G. Bednorz and K. A. Muller, ibid. B35 (1987) 5334.
J. R. Kirtley, C. C. Tsui, Sung I. Park, C. C. Chi, J. Rozen and M. W. Shafer, ibid. B35 (1987) 7216.
J. Moreland, H. F. Clark and H. C. Ku, Cryogenics 27 (1987) 227.
M. E. Hawley, K. E. Gray, D. W. Capone II and D. G. Hinks, Phys. Rev. B35 (1987) 7224.
J. R. Kirtley, R. T. Coolins, Z. Schlesinger, W. J. Gallagher, R. L. Sandstrom, T. R. Dinger and D. A. Chance, ibid. B35 (1987) 8846.
L. C. Bourne, M. F. Crommie, A. Zettl, Hanconrad Zur Loye, S. W. Weller, K. J. Leary and D. E. Morris, Phys. Rev. Lett. 58 (1987) 2337.
B. Batlogg, R. J. Cava, A. Jayaraman, R. B. Van Dover, G. A. Kourouklis, S. Sunshine, D. W. Murphy, L. W. Rupp, H. S. Chen, A. White, K. T. Short, A. M. Mujsce and E. A. Reitman, ibid. 58 (1987) 2333.
T. Freltoft, J. P. Remeika, D. E. Monoton, A. S. Cooper, J. E. Fischer, D. Harshman, G. Shirane, S. K. Sinha and D. Vaknin, Phys. Rev. B36 (1987) 826.
D. C. Johnston, J. P. Stokes, D. P. Goshorm and J. T. Lewandowski, ibid. B36 (1987) 4007.
J. M. Tranquada, D. E. Cox, W. Kunnmann, H. Moudden, G. Shirane, M. Suenaga, P. Zolliker, D. Vakmin, S. K. Sinha, M. S. Alvarez, A. J. Jacobson and D. C. Johnston, Phys. Rev. Lett. 60 (1988) 156.
M. Stavola, R. J. Cava and E. A. Reitman, ibid. 58 (1987) 1571.
K. Ohbayashi, N. Ogita, M. Udagawa, Y. Aoki, Y. Maeno and T. Fujita, Jap. J. Appl. Phys. 26 (1987) L433.
K. Muraleedharan and D. Rambabu, Phys. Rev. B36 (1987) 8918.
K. K. Singh, P. Ganguly and J. B. Goodenough, J. Solid State Chem. 52 (1974) 254.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Rambabu, D., Muraleedharan, K. Infrared study of relevance of Nd2CuO4 structure to superconductivity of La-Sr-Cu-O system. Journal of Materials Science 34, 4597–4599 (1999). https://doi.org/10.1023/A:1004678330722
Issue Date:
DOI: https://doi.org/10.1023/A:1004678330722