SUPERCONDUCTOR WITH TC UP TO 80-K IN THE COMPOUND (LN,CA)(SR,BA)2(C,CU)CU2O7-DELTA

被引：14

作者：

DEN, T ^{[1
]}

KOBAYASHI, T ^{[1
]}

AKIMITSU, J ^{[1
]}

机构：

[1] AOYAMA GAKUIN UNIV,DEPT PHYS,TOKYO 157,JAPAN

来源：

PHYSICA C | 1993年 / 208卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(93)90208-8

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have synthesized a new family of oxycarbonate compounds (Ln,Ca)(Sr,Ba)2(C,CU)Cu2O7-delta (Ln: rare-earth metals) with a so-called ''CO3-1212'' structure. Two kinds of single phase in the general formula Er0.5Ca0.5Sr2-xBaCu3-yCyO7-delta with (x, y) = (0.6, 0.5) and ( 1.3, 0.4) were prepared at different CO2 partial pressures. The former compound shows a superconducting transition at about 45 K, and the latter has T(c) up to 80 K. This rise in T(c) may come from the increase of carrier density because of the decrease of carbon content. We have also studied the Ln-dependence, and it is revealed that most of the compounds Ln0.5Ca0.5Sr0.7Ba1.3Cu2.6C0.4O7-delta ShoW the same results, except for Ln = Ce and Th, which did not construct the structure, and also Ln = Pr, which shows suppressed superconductivity with T(c) of 30 K.

引用

页码：351 / 355

页数：5

共 14 条

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KINOSHITA, K ;

MATSUI, Y .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1992, 201 (3-4) :320-324

[2]

AKIMITSU J, UNPUB

[3] SYNTHESIS AND STRUCTURE OF SR1.5BA0.5CUO2(CO3) - AN OXYCARBONATE CONTAINING INFINITE CUO2 LAYERS [J].

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[4] SYNTHESIS AND CRYSTAL-STRUCTURE OF BASRCUO2+X-BULLET-CO3 [J].

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HUANG, Q ;

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PHYSICA C, 1992, 195 (3-4) :335-344

[5] THE CRYSTAL-STRUCTURE OF THE SUPERCONDUCTING COPPER-OXIDE CARBONATE (BA1-XSRX)2CU1+YO2+2Y+Z(CO3)1-Y - DEFECTS IN CHARGE RESERVOIRS AND SUPERCONDUCTIVITY [J].

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[6] A NEW COPPER-OXIDE SUPERCONDUCTOR CONTAINING CARBON [J].

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[7] HIGH-PRESSURE SYNTHESIS OF SUPERCONDUCTING (BA1-XSRX)2CU1+YO2+2Y+DELTA(CO3)1-Y(0.35-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.6,Y-APPROXIMATE-TO-0.1) [J].

KINOSHITA, K ;

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JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1992, 31 (7A) :L832-L834

[8] THE CRYSTAL-STRUCTURE OF (C0.4CU0.6)SR2(Y0.86SR0.14)CU2O7 [J].

MIYAZAKI, Y ;

YAMANE, H ;

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HIRAI, T .

PHYSICA C, 1992, 198 (1-2) :7-13

[9] PREPARATION OF A NEW COMPOUND, Y2.0SR5.0CU6.0C0.9O16.2 [J].

MIYAZAKI, Y ;

YAMANE, H ;

HIRAI, T .

PHYSICA C, 1992, 198 (1-2) :53-56

[10] PREPARATION AND CRYSTAL-STRUCTURE OF SR2CUO2(CO3) [J].

MIYAZAKI, Y ;

YAMANE, H ;

KAJITANI, T ;

OKU, T ;

HIRAGA, K ;

MORII, Y ;

FUCHIZAKI, K ;

FUNAHASHI, S ;

HIRAI, T .

PHYSICA C, 1992, 191 (3-4) :434-440

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