INFLUENCE OF THE SYNTHESIS CONDITIONS AND CARBONATE CONTENT ON THE PROPERTIES OF Y2BA4CU7O14+X

被引：10

作者：

KARPINSKI, J

CONDER, K

SCHWER, H

KRUGER, C

KALDIS, E

MACIEJEWSKI, M

ROSSEL, C

MALI, M

BRINKMANN, D

机构：

[1] SWISS FED INST TECHNOL,TCL,CH-8092 ZURICH,SWITZERLAND

[2] IBM CORP,DIV RES,CH-8803 RUSCHLIKON,SWITZERLAND

[3] UNIV ZURICH,INST PHYS,CH-8001 ZURICH,SWITZERLAND

来源：

PHYSICA C | 1994年 / 227卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90358-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A study of the thermodynamic, magnetic, structural and physical properties of the Y2BaCu7O14+x (247) phase is presented in this paper. The stability range of the 247 phase in the P-T phase diagram forms a narrow band between that of the 124 and 123 phases. The critical temperature T(c) of fully oxygenated ceramic samples varies from 50 to 93 K as the content of the carbonate changes from 6000 to 500 ppm. Susceptibility measurements performed on pure sintered samples with low CO2 content show a T(c) onset at 93 K with a sharp transition. At a low magnetic field a shoulder caused by weak links has been observed. NQR measurements of ceramic samples and single-crystal X-ray investigations proved a high structural perfection of the samples with T(c) > 90.K can clearly showed the existence of many defects in the materials with lower T(c). The increase of T(c) from 4 to 90 K in the 247 crystals is coupled with a decrease of the apical bond length.

引用

页码：68 / 76

页数：9

共 25 条

[1] STRUCTURE DETERMINATION OF THE NEW HIGH-TEMPERATURE SUPERCONDUCTOR Y2BA4CU7O14+X [J].

BORDET, P ;

CHAILLOUT, C ;

CHENAVAS, J ;

HODEAU, JL ;

MAREZIO, M ;

KARPINSKI, J ;

KALDIS, E .

NATURE, 1988, 334 (6183) :596-598

[2] STRUCTURAL ANOMALIES, OXYGEN ORDERING AND SUPERCONDUCTIVITY IN OXYGEN DEFICIENT BA2YCU3OX [J].

CAVA, RJ ;

HEWAT, AW ;

HEWAT, EA ;

BATLOGG, B ;

MAREZIO, M ;

RABE, KM ;

KRAJEWSKI, JJ ;

PECK, WF ;

RUPP, LW .

PHYSICA C, 1990, 165 (5-6) :419-433

[3] HIGH-ACCURACY VOLUMETRIC DETERMINATION OF OXYGEN IN Y-BA-CU-O SUPERCONDUCTORS - YBA2CU3O6.5+X [J].

CONDER, K ;

RUSIECKI, S ;

KALDIS, E .

MATERIALS RESEARCH BULLETIN, 1989, 24 (05) :581-587

[4]

CONDER K, UNPUB

[5] PREPARATION, RESISTIVITY, MAGNETIC-PROPERTIES AND SPECIFIC-HEAT OF THE 95-K SUPERCONDUCTOR YBA2CU3.5O7.5+X (247) [J].

GENOUD, JY ;

GRAF, T ;

JUNOD, A ;

SANCHEZ, D ;

TRISCONE, G ;

MULLER, J .

PHYSICA C, 1991, 177 (4-6) :315-329

[6] VARIATION OF THE SUPERCONDUCTING AND STRUCTURAL-PROPERTIES OF Y2BA4CU7OZ WITH OXYGEN-CONTENT (14.1 LESS-THAN Z LESS-THAN 15.3, 30 K LESS-THAN-OR-EQUAL-TO TC LESS-THAN-OR-EQUAL-TO 95 K) [J].

GENOUD, JY ;

GRAF, T ;

TRISCONE, G ;

JUNOD, A ;

MULLER, J .

PHYSICA C, 1992, 192 (1-2) :137-146

[7] HIGH-RESOLUTION NEUTRON POWDER DIFFRACTION INVESTIGATION OF TEMPERATURE AND PRESSURE EFFECTS ON THE STRUCTURE OF THE HIGH-TC SUPERCONDUCTOR Y2BA4CU7O15 [J].

HEWAT, AW ;

FISCHER, P ;

KALDIS, E ;

KARPINSKI, J ;

RUSIECKI, S ;

JILEK, E .

PHYSICA C, 1990, 167 (5-6) :579-590

[8] STRUCTURAL-PROPERTIES OF OXYGEN-DEFICIENT YBA2CU3O7-DELTA [J].

JORGENSEN, JD ;

VEAL, BW ;

PAULIKAS, AP ;

NOWICKI, LJ ;

CRABTREE, GW ;

CLAUS, H ;

KWOK, WK .

PHYSICAL REVIEW B, 1990, 41 (04) :1863-1877

[9] STRUCTURAL AND PHYSICAL-PROPERTIES OF THE SINGLE AND DOUBLE CHAIN Y-BA-CU-O PHASES 124 AND 123.5 [J].

KALDIS, E ;

KARPINSKI, J ;

RUSIECKI, S ;

BUCHER, B ;

CONDER, K ;

JILEK, E .

PHYSICA C, 1991, 185 (pt 1) :190-197

[10] THE NONSTOICHIOMETRY OF THE HIGH-TC SUPERCONDUCTOR Y2BA4CU7O15+/-X (14-K LESS-THAN-OR-EQUAL-TO TC LESS-THAN-OR-EQUAL-TO 68-K) [J].

KARPINSKI, J ;

RUSIECKI, S ;

BUCHER, B ;

KALDIS, E ;

JILEK, E .

PHYSICA C, 1989, 161 (5-6) :618-625

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