High-pressure synthesis of a new oxycarbonate superconductor CCa3Cu2O7+delta

被引：11

作者：

Matveev, AT ^{[1
]}

Matsui, Y ^{[1
]}

Yamaoka, S ^{[1
]}

TakayamaMuromachi, E ^{[1
]}

机构：

[1] NATL INST RES INORGAN MAT,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICA C | 1997年 / 288卷 / 3-4期

关键词：

oxycarbonate superconductor; CCa3Cu2O7+delta; high-pressure synthesis; HRTEM;

D O I：

10.1016/S0921-4534(97)01481-0

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A new oxycarbonate superconductor CCa3Cu2O7+delta (CCa2CaCu2O7+delta, C-1212) with T-c = 47 K was synthesized at 6 GPa and 1275 degrees C. It is the first superconductor which contains only Ca as the A-site cation. X-ray powder diffraction and HRTEM studies indicated that this phase has a M-1212 type structure with a = 3.842(1) and c = 10.336(1) Angstrom. The metal site in the charge reservoir is occupied only by C without partial replacement of Cu. Carriers are created by excess-oxygen atoms probably introduced into the charge reservoir. (C) 1997 Elsevier Science B.V.

引用

页码：185 / 189

页数：5

共 12 条

[1] SUPERCONDUCTIVITY IN THE NEW COMPOUND (Y1-XCAX)0.95SR2.05CU2.4(CO3)0.6OY [J].

AKIMITSU, J ;

UEHARA, M ;

OGAWA, M ;

NAKATA, H ;

TOMIMOTO, K ;

MIYAZAKI, Y ;

YAMANE, H ;

HIRAI, T ;

KINOSHITA, K ;

MATSUI, Y .

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

[2] Enhancement of T-c of CyCu1-yBa2Ca2Cu3Ox from 67 K to 120 K by reduction treatments [J].

Chaillout, C ;

Le Floch, S ;

Gautier, E ;

Bordet, P ;

Acha, C ;

Feng, Y ;

Sulpice, A ;

Tholence, JL ;

Marezio, M .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1996, 266 (3-4) :215-222

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

CHAILLOUT, C ;

HUANG, Q ;

CAVA, RJ ;

CHENAVAS, J ;

SANTORO, A ;

BORDET, P ;

HODEAU, JL ;

KRAJEWSKI, JJ ;

LEVY, JP ;

MAREZIO, M ;

PECK, WF .

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

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

DEN, T ;

KOBAYASHI, T ;

AKIMITSU, J .

PHYSICA C, 1993, 208 (3-4) :351-355

[5] ORDERED SUBSTITUTION OF CO3 GROUPS FOR CUO4 SQUARE GROUPS IN THE 123 STRUCTURE - THE OXYCARBONATE Y4SR8CU11CO3O25, N=4 MEMBER OF THE SERIES YNSR2NCU3N-1CO3O7N-3 [J].

DOMENGES, B ;

HERVIEU, M ;

RAVEAU, B .

PHYSICA C, 1993, 207 (1-2) :65-78

[6] NEW OXYCARBONATE SUPERCONDUCTORS (CU0.5C0.5)BA2CAN-1CUNO2N+3 (N=3,4) PREPARED AT HIGH-PRESSURE [J].

KAWASHIMA, T ;

MATSUI, Y ;

TAKAYAMAMUROMACHI, E .

PHYSICA C, 1994, 224 (1-2) :69-74

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

KINOSHITA, K ;

YAMADA, T .

NATURE, 1992, 357 (6376) :313-315

[8] 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

[9] PREPARATION, CRYSTAL-STRUCTURE AND SUPERCONDUCTIVITY OF (C,CU)(SR,CA)(2)(Y,CA,SR)CU2O7 [J].

MIYAZAKI, Y ;

YAMANE, H ;

KAJITANI, T ;

KOBAYASHI, N ;

HIRAGA, K ;

MORII, Y ;

FUNAHASHI, S ;

HIRAI, T .

PHYSICA C, 1994, 230 (1-2) :89-96

[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

← 1 2 →