SYNTHESIS OF BI2SR2CACU2O8/BI2SR2CUO6 SUPERLATTICES WITH A T(C) ENHANCEMENT EFFECT

被引：43

作者：

LI, ZZ

RIFI, H

VAURES, A

MEGTERT, S

RAFFY, H

机构：

[1] Laboratoire de Physique des Solides, Université Paris Sud

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.72.4033

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Bi2Sr2CaCu2O8(2212)/Bi2Sr2CuO6(2201) superlattices epitaxially grown in situ by reactive rf magnetron sputtering on heated MgO substrates were studied by x-ray diffraction methods and resistive measurements. The highest T(c)(R = 0) of 94 K, notably higher than that of single phase 2212 films prepared in the same conditions (T(c) = 75-80 K), was obtained for (2212)m/(2201)n superlattices where the numbers m of c-axis half-unit cells are close to unity. We attribute this fact to the metallic nature of the intervening 2201 layer favoring in such a situation an optimal O2 doping of the 2212 layers.

引用

页码：4033 / 4036

页数：4

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