Synthesis and neutron powder diffraction study of Tb2-xBa2+xCu2+yTi2-yO11

被引：2

作者：

Jorgensen, JE ^{[1
]}

Markvardsen, AJ

机构：

[1] Aarhus Univ, Dept Chem, DK-8000 Aarhus C, Denmark

[2] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

来源：

PHYSICA C | 2001年 / 349卷 / 1-2期

关键词：

quadruple perovskites; cation distribution; neutron diffraction;

D O I：

10.1016/S0921-4534(00)01517-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Samples of the quadruple perovskites Tb2-xBa2+xCu2+yTi2-O11 have been prepared for values of x = 0.0 and 0.2 and y = 0.0 and 0.1. The prepared samples were studied by neutron powder diffraction and Cu/Ti and Nd/Ba cation disorder was found to be present in all three studied compounds and the excess Ba in the x = 0.2 samples are located in the Tb 1d(1/2 1/2 1/2) site while the Tb 1c (1/2 1/2 0) site between the CuO2 layers is fully occupied by Tb ions. In addition, it was found that no Ti is substituted for Cu in the CuO2 layers in the Tb1.8Ba2.2Cu2.1Ti1.9O11 sample. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：25 / 29

页数：5

相关论文

共 14 条

[1] ELECTRICAL-PROPERTIES AND CRYSTAL-STRUCTURES OF THE HOMOLOGOUS SERIES OF OXIDES ND2BA2CAMCENTI2-DELTA-CU2+DELTA-O11+M+2N (M, N=0 OR 1) [J].

DEN, T ;

KOBAYASHI, T ;

IZUMI, F ;

KAMIYAMA, T ;

SHIMAKAWA, Y ;

JORGENSEN, JD ;

ROTELLA, FJ ;

HITTERMAN, RL .

PHYSICA C, 1995, 255 (1-2) :37-52

[2] CHEMICAL AND STRUCTURAL RELATIONSHIPS IN HIGH-TC MATERIALS [J].

GOODENOUGH, JB .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1990, 3 (01) :26-37

[3] NEW QUADRUPLE PEROVSKITE GD2BA2TI2CU2O11 - A POTENTIAL SUPERCONDUCTING PARENT PHASE [J].

GORMEZANO, A ;

WELLER, MT .

JOURNAL OF MATERIALS CHEMISTRY, 1993, 3 (07) :771-772

[4] NEW QUADRUPLE PEROVSKITES LN2BA2TIXSN2-XCU2O11, (0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-2) - CONTROLLING COPPER-OXYGEN DISTANCES IN POTENTIAL SUPERCONDUCTING PARENT PHASES [J].

GORMEZANO, A ;

WELLER, MT .

JOURNAL OF MATERIALS CHEMISTRY, 1993, 3 (09) :979-982

[5] X-RAY AND NEUTRON DIFFRACTION STUDY OF TETRAGONAL BARIUM TITANATE [J].

HARADA, J ;

PEDERSEN, T ;

BARNEA, Z .

ACTA CRYSTALLOGRAPHICA SECTION A-CRYSTAL PHYSICS DIFFRACTION THEORETICAL AND GENERAL CRYSTALLOGRAPHY, 1970, A 26 :336-&

[6] NEUTRON-SCATTERING LENGTHS - A SURVEY OF EXPERIMENTAL-DATA AND METHODS [J].

KOESTER, L ;

RAUCH, H ;

SEYMANN, E .

ATOMIC DATA AND NUCLEAR DATA TABLES, 1991, 49 (01) :65-120

[7] SUBSTITUTION OF 3D METALS FOR CU IN BI2(SR0.6CA0.4)3CU2OY [J].

MAEDA, A ;

YABE, T ;

TAKEBAYASHI, S ;

HASE, M ;

UCHINOKURA, K .

PHYSICAL REVIEW B, 1990, 41 (07) :4112-4117

[8] Synthesis and neutron powder diffraction study of Nd2-xBa2+xCu2Ti2O11 for x = 0.0 and 0.3 [J].

Markvardsen, A ;

Jorgensen, JE ;

Wannberg, A ;

Delaplane, RG .

PHYSICA C, 1998, 300 (1-2) :110-114

[9]

NAKINOMA N, 1999, PHYS REV B, V59, P1491

[10] Cationic substitutions and doping in the series of layered perovskites Ln(2)Ba(2)Cu(2)Ti(2)O(11) (Ln=La, Nd, Eu, Tb) [J].

Palacin, MR ;

CasanPastor, N ;

Kramer, G ;

Jansen, M ;

GomezRomero, P .

PHYSICA C, 1996, 261 (1-2) :71-80