Static disorder in the incommensurate structure of the high T-c superconductor Bi(2)Sr(2)CaCu(2)O8+delta

被引：39

作者：

Grebille, D ^{[1
]}

Leligny, H ^{[1
]}

Ruyter, A ^{[1
]}

Labbe, P ^{[1
]}

Raveau, B ^{[1
]}

机构：

[1] UNIV TOURS,LAB LETO,F-37000 TOURS,FRANCE

来源：

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE | 1996年 / 52卷

关键词：

D O I：

10.1107/S0108768196004673

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The incommensurate modulated structure of the high T-c superconductor of nominal composition Bi2Sr2CaCu2O8 has been refined using an optimized data set of 1530 reflections (496 main reflections, 753 first-order and 281 second-order satellites) in superspace group Bbmb(0 beta 1) using a Fourier expansion of the modulation functions up to second order. A large improvement of the R (wR) factor [global: 0.056 (0.051); main reflections: 0.049 (0.043); first-order satellites: 0.056 (0.058); second-order satellites: 0.078 (0.079)] is obtained by the introduction of a static modulated disorder on the Bi site without any thermal factor modulation and by considering occupational modulation functions. A detailed comparison with previous studies in modulated structure models or in supercell models is given, in particular for the description of the BiO layers.

引用

页码：628 / 642

页数：15

共 32 条

[1] X-RAY-ABSORPTION STUDIES OF BI-BASED SUPERCONDUCTORS [J].

AKHTAR, ZUN ;

AKHTAR, MJ ;

CATLOW, CRA .

JOURNAL OF MATERIALS CHEMISTRY, 1994, 4 (07) :1081-1091

[2] STRUCTURAL-CHANGES IN BI2SR2CACU2O8+X SINGLE-CRYSTALS BETWEEN 20-DEGREES-C AND 875-DEGREES-C [J].

BDIKIN, IK ;

DOROKHOVA, NA ;

LENCHINENKO, DY ;

KULAKOV, MP ;

SHEKHTMAN, VS ;

SHMYTKO, IM .

PHYSICA C, 1992, 196 (1-2) :191-199

[3] NEUTRON-DIFFRACTION STUDY OF THE MODULATED STRUCTURE OF BI2(SR, CA)3CU2O8+Y [J].

BESKROVNYI, AI ;

DLOUHA, M ;

JIRAK, Z ;

VRATISLAV, S ;

POLLERT, E .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1990, 166 (1-2) :79-86

[4] BOND-VALENCE PARAMETERS FOR SOLIDS [J].

BRESE, NE ;

OKEEFFE, M .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1991, 47 :192-197

[5] BOND-VALENCE PARAMETERS OBTAINED FROM A SYSTEMATIC ANALYSIS OF THE INORGANIC CRYSTAL-STRUCTURE DATABASE [J].

BROWN, ID ;

ALTERMATT, D .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1985, 41 (AUG) :244-247

[6] DISORDER IN THE BIO-SUBLATTICE OF BI2SR2CAN-1CUNO2N+4+Z PHASES [J].

BUDIN, H ;

EIBL, O ;

PONGRATZ, P ;

SKALICKY, P .

PHYSICA C, 1993, 207 (3-4) :208-224

[7] THE MODULATED STRUCTURE OF BI2SR3-XCAXCU2O8 - A COMMENSURATE MODEL FROM SINGLE-CRYSTAL X-RAY-DIFFRACTION DATA [J].

CALESTANI, G ;

RIZZOLI, C ;

FRANCESCONI, MG ;

ANDREETTI, GD .

PHYSICA C, 1989, 161 (5-6) :598-606

[8]

DOUDIN B, 1985, COMMUNICATION

[9] SPECIAL GRAIN-BOUNDARIES IN HIGH-TC BI2SR2CACU2O8+DELTA [J].

EIBL, O .

PHYSICA C, 1990, 168 (1-2) :239-248

[10] COMBINED X-RAY SINGLE-CRYSTAL AND NEUTRON POWDER REFINEMENT OF MODULATED STRUCTURES AND APPLICATION TO THE INCOMMENSURATELY MODULATED STRUCTURE OF BI2SR2CACU2O8+Y [J].

GAO, Y ;

COPPENS, P ;

COX, DE ;

MOODENBAUGH, AR .

ACTA CRYSTALLOGRAPHICA SECTION A, 1993, 49 :141-148

← 1 2 3 4 →