Abstract
In La2−x Ba x CuO4 (LBCO), the structural transition to a low-temperature tetragonal phase below 60 K and suppression of superconductivity are observed when the carrier density isp ∼ 1 /8 per copper. The replacement by divalent ions smaller than Ba2+ suppresses the static deformation of the lattice. We have found that the variationsT d2 and superconducting transition temperatureT c are quantitatively characterized by the averaged ionic radius at the La site or lattice parameters. This aspect of substitution could be regarded as the effect of chemical pressure, since similar variations have been reported on applying hydrostatic pressure. In La2−x−y Nd y (Ba, Sr) x CuO4,T d2 increases with increasingy in a wide range ofp whileT c is suppressed only at p∼ l /8. The structural transition atT d2 here should be ascribed mainly to the crystallochemical origin.
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References
T. Suzuki and T. Fujita,J. Phys. Soc. Jpn. 58, 1883 (1989);Physica C 159, 111 (1989).
J. D. Axe, A. H. Moudden, D. Hohlwein, D. E. Cox, K. M. Mohanty, A. R. Moodenbaugh, and Y. Xu,Phys. Lett. Rev. 62, 2751 (1989).
Y. Maeno, N. Kakehi, M. Kato, and T. Fujita,Phys. Rev. B 44, 7753 (1991).
Y. Maeno, A. Odagawa, N. Kakehi, T. Suzuki, and T. Fujita,Physica C 173, 322 (1991).
K. Yoshida, F. Nakamura, Y. Tanaka, Y. Maeno, T. Kagayama, G. Oomi, and T. Fujita, to be published in Proc. LT20 (1993).
R. D. Shannon.Acta Crystallogr. A 32, 751 (1976).
N. Yamada and M. Ido,Physica C 203, 240 (1992).
R. S. Markiewicz,J. Phys.: Condens. Matter 2, 6223 (1990);Physica C 193, 323 (1992).
Y. Maeno, M. Nohara, F. Nakamura, T. Suzuki, and T. Fujita,this issue.
B. Büchner, M. Braden, M. Cramm, W. Schlabitz, W. Schnelle, O. Hoffels, W. Braunisch, R. Müller, G. Heger, and D. Wohlleben,Physica C 185–189, 903 (1991).
M. K. Crawford, R. L. Harlow, E. M. McCarron, W. E. Farneth, J. D. Axe, H. Chou, and Q. Huang,Phys. Rev. B 44, 7749 (1991).
Y. Tanaka, Y. Maeno, F. Nakamura, and T. Fujita, submitted to Proc. LT20 (1993).
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Nakamura, F., Yoshida, K., Tanaka, Y. et al. Stability of the low-temperature tetragonal phase in La2−x Ba x CuO4 and related compounds. J Supercond 7, 33–35 (1994). https://doi.org/10.1007/BF00730363
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DOI: https://doi.org/10.1007/BF00730363