Abstract
The effect of charge disorder on the formation of an inhomogeneous state of the electron system in the conduction band in BaPb1 − x Sb x O3 superconducting oxides is investigated experimentally by NMR methods. The NMR spectra of 17O are measured systematically, and the contributions from 17O atoms with different cation nearest surroundings are identified. It is found that microscopic regions with an elevated spin density of charge carriers are formed within two coordination spheres near antimony ions. Nuclei of the superconducting phase of the oxide (regions with an elevated antimony concentration) microscopically distributed over the sample are detected in compounds with x = 0.25 and 0.33. Experiments in which a double resonance signal of the spin echo of 17O-207Pb and 17O-121Sb are measured in the metal phase of BaPb1 − x Sb x O3 oxides are carried out for the first time. The constants of indirect heteronuclear spin-spin 17O-207Pb interaction are determined as functions of the local Knight shift 207 Ks. The estimates of the constants of the indirect interaction between the nuclei of the nearest neighbors (O-Pb and Pb-Pb atoms) and analysis of evolution of the NMR spectra of 17O upon a change in the antimony concentration are convincing evidence in favor of the development of a microscopically inhomogeneous state of the electron system in the metal phase of BaPb1 − x Sb x O3 oxides.
Similar content being viewed by others
References
A. W. Sleight, J. L. Gilson, and P. E. Bierstadt, Solid State Commun. 17, 27 (1975).
R. J. Cava, B. Batlogg, G. P. Espinosa, A. P. Ramirez, J. J. Krajewski, W. F. Peck, Jr., L. W. Rupp, Jr., and A. S. Cooper, Nature (London) 339, 291 (1989).
T. Itoh, K. Kitazawa, and S. Tanaka, J. Phys. Soc. Jpn. 53, 2668 (1984).
B. Batlogg, R. J. Cava, L. W. Rupp, Jr., A. M. Mujsce, J. J. Krajewski, J. P. Remeika, W. F. Peck, Jr., A. S. Cooper, and G. P. Espinosa, Phys. Rev. Lett. 61, 1670 (1988).
B. Batlogg, R. J. Cava, L. W. Rupp, Jr., G. P. Espinosa, J. J. Krajewski, W. F. Peck, Jr., and A. S. Cooper, Physica C (Amsterdam) 162–164, 1393 (1989).
K. Kitazawa, A. Katsui, A. Toriumi, and S. Tanaka, Solid State Commun. 52, 459 (1984).
M. Itoh, T. Sawada, I.-S. Kim, Y. Inaguma, and T. Nakamura, Physica C (Amsterdam) 204, 194 (1992).
M. Yasukawa, A. Kadota, M. Maruta, H. Tanaka, T. Kono, and H. Kawakita, Solid State Commun. 124, 49 (2002).
H. Namatame, A. Fujimori, H. Takagi, S. Uchida, F. M. F. de Groot, and J. C. Fuggle, Phys. Rev. B: Condens. Matter 48, 16917 (1993).
A. P. Menushenkov, S. Benazeth, J. Purans, A. Yu. Ignatov, and K. V. Klementev, Physica C (Amsterdam) 277, 257 (1997).
L. F. Mattheiss and D. R. Hamann, Phys. Rev. B: Condens. Matter 28, 4227 (1983).
J. P. Julien, D. A. Papaconstantopoulos, F. Cyrot-Lackmann, and A. Pasturel, Phys. Rev. B: Condens. Matter 43, 2903 (1991).
D. T. Marx, P. G. Radaelli, J. D. Jorgensen, R. L. Hitterman, D. G. Hinks, S. Pei, and B. Dabrowski, Phys. Rev. B: Condens. Matter 46, 1144 (1992).
S. Tajima, S. Uchida, A. Masaki, H. Takagi, K. Kitazawa, S. Tanaka, and A. Katsui, Phys. Rev. B: Condens. Matter 32, 6302 (1985).
M. Eibschutz, W. M. Reiff, R. J. Cava, J. J. Krajewski, and W. F. Peck, Jr., Appl. Phys. Lett. 56, 2339 (1990).
F. M. Mulder and R. C. Thiel, Physica C (Amsterdam) 201, 80 (1992).
W. T. Fu and R. J. Drost, Physica C (Amsterdam) 304, 51 (1998).
F. J. M. Benschop, H. B. Brom, H. W. Zandbergen, and R. J. Cava, Physica C (Amsterdam) 235–240, 2527 (1994).
A. F. Sadykov, Yu. V. Piskunov, V. V. Ogloblichev, I. Yu. Arapova, A. P. Gerashchenko, A. L. Buzlukov, S. V. Verkhovskii, and I. A. Leonidov, JETP Lett. 91(5), 245 (2010).
Yu. Piskunov, A. Gerashenko, A. Pogudin, A. Ananyev, K. Mikhalev, K. Okulova, S. Verkhovskii, A. Yakubovsky, and A. Trokiner, Phys. Rev. B: Condens. Matter 65, 134518 (2002).
A. Abragam, Principles of Nuclear Magnetism (Oxford University Press, Oxford, 1961; Inostrannaya Literatura, Moscow, 1963).
D. E. Kaplan and E. L. Hahn, J. Phys. Radium 19, 821 (1958).
M. Emshwiller, E. L. Hahn, and D. Kaplan, Phys. Rev. 118, 414 (1960).
C. P. Slichter, Principles of Magnetic Resonance (Springer, New York, 1990).
Hyperfine Interactions in Solids: Selected Lectures and Reviews (Mir, Moscow, 1970) [in Russian].
J. Winter, Magnetic Resonance in Metals (Clarendon, Oxford 1971; Mir, Moscow, 1976).
M. A. Ruderman and C. Kittel, Phys. Rev. 96, 99 (1954).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © Yu.V. Piskunov, V.V. Ogloblichev, I.Yu. Arapova, A.V. Sadykov, A.P. Gerashchenko, S.V. Verkhovskii, 2011, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2011, Vol. 140, No. 5, pp. 951–960.
Rights and permissions
About this article
Cite this article
Piskunov, Y.V., Ogloblichev, V.V., Arapova, I.Y. et al. Electron density distribution in BaPb1 − x Sb x O3 superconducting oxides studied by double nuclear magnetic resonance methods. J. Exp. Theor. Phys. 113, 826–834 (2011). https://doi.org/10.1134/S1063776111130085
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063776111130085