Simple Double-Layer Cuprates: 60K Superconductivity in a Lanthanum Barium Strontium Copper Oxide $[La_{1.6}Ba_{0.4}SrCu_20_6]$

Mahesh, R and Vijayaraghavan, R and Rao, CNR (1994) Simple Double-Layer Cuprates: 60K Superconductivity in a Lanthanum Barium Strontium Copper Oxide $[La_{1.6}Ba_{0.4}SrCu_20_6]$. In: Materials Research Bulletin, 29 (3). pp. 303-307.

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Abstract

Double layer cuprates of the formulae $LaSrLnCu_20_6$ (Ln = Y or rare earth) and $La_{2-x}Ba_XACu_2O_6$ (A = Ca, Sr) have been prepared by the tradltzonal ceramlc method and also by heating CuO, $KCIO_3$ and a carbonate mixture obtained by coprecipitation. All these cuprates are tetragonal with the I4/mmm space group. While cuprates of the type $LaSrLnCu_20_6$ are always insulating independent of the method of preparation, $La_{1.6}Ba_{0.4}SrCu_20_6$ showed an onset of superconductivity at 60k. this appears to be the second such cuprate of the $A_nB_nO_{3n+1}$ series with n = 2 exhibiting superconductivity.

Item Type:	Journal Article
Publication:	Materials Research Bulletin
Publisher:	Elsevier
Additional Information:	The copyright of this article belongs to Elsevier.
Keywords:	Double layer cuprates;Lanthanum;Barium;Calcium;Strontium; Copper;Superconductors
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	12 Jul 2006
Last Modified:	19 Sep 2010 04:30
URI:	http://eprints.iisc.ac.in/id/eprint/8029

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