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Issue		Europhys. Lett. Volume 45, Number 3, February 1999
Page(s)		387 - 392
Section		Condensed matter: electronic structure, electrical, magnetic and optical properties
DOI		10.1209/epl/i1999-00176-1

DOI: 10.1209/epl/i1999-00176-1


Europhys. Lett, 45 (3), pp. 387-392 (1999)

Superconductivity in two-leg spin ladders $\rm [A{}_2Cu_3]{}_5[CuO_7$
$\rm (A=Sr, Ca, Bi, Y, Pb)$

L. Leonyuk ¹, G.-J. Babonas ², R. Szymczak ³, H. Szymczak ³, M. Baran ³
A. Reza ², V. Maltsev ¹, L. Shvanskaya ¹ and V. Rybakov ¹

¹ Moscow State University - 119899 Moscow, Russia
² Semiconductor Physics Institute - 2600 Vilnius, Lithuania
³ Institute of Physics - 02-668 Warsaw, Poland

(received 10 November 1997; accepted in final form 25 November 1998)

PACS. 74.72-h - High-$T_{\rm c}$ compounds.
PACS. 75.20-g - Diamagnetism and paramagnetism.
PACS. 78.20-e - Optical properties of bulk materials and thin films.

Abstract:

The single crystals with two-leg spin-ladder-type structure were investigated. According to the structural, magnetic, optical and resistivity data obtained, the studied crystals $\rm [A{}_2Cu_3]{}_5[CuO_7$were shown, for the first time, to be high-$T_{\rm c}$ superconductors ($T_{\rm c}$=80 K) which belong to the class of cuprates with incommensurate-type structure.

***

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