A SYSTEMATIC NEUTRON-DIFFRACTION STUDY OF RBA2CU3O7 (R=YTTRIUM AND RARE-EARTHS) HIGH-T(C) SUPERCONDUCTORS

被引:80
作者
GUILLAUME, M
ALLENSPACH, P
MESOT, J
ROESSLI, B
STAUB, U
FISCHER, P
FURRER, A
机构
[1] Laboratorium für Neutronenstreuung, Eidgenössische Technische Hochschule Zürich, Villigen PSI
来源
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1993年 / 90卷 / 01期
关键词
D O I
10.1007/BF01321027
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The 10 K crystal structures of high-T(c) RBa2Cu3O7 (R = Y and rare earths) ceramic materials investigated by neutron diffraction were consistently analysed concerning systematic trends. Several interionic distances exhibit the well known lanthanide contraction behaviour, i.e., a linear relationship with the ionic radii of trivalent rare-earth ions. The only exceptions are associated with the apex oxygen O(1) ions: the chain copper Cu(1)-O(1) distances are constant, and the plane copper Cu(2)-O(1) distances are increasing across the rare-earth series. For R = Pr the 4f-CuO2 valence band hybridization effects are found to be highly anisotropic, since exclusively the interionic distances involving the b-direction (i.e, the chain direction) indicate that the Pr ions have an intermediate valence of about +3.4.
引用
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页码:13 / 17
页数:5
相关论文
共 15 条
[1]  
BUCHGEISTER M, 1991, THESIS U BONN
[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]   STRUCTURE OF THE HIGH-TEMPERATURE SUPERCONDUCTOR BA2YCU3O7 BY X-RAY AND NEUTRON POWDER DIFFRACTION [J].
FRANCOIS, M ;
WALKER, E ;
JORDA, JL ;
YVON, K ;
FISCHER, P .
SOLID STATE COMMUNICATIONS, 1987, 63 (12) :1149-1153
[4]  
FURRER A, 1991, EUR J SOL STATE INOR, V28, P627
[5]   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
[6]  
LI WH, 1989, PHYS REV B, V40, P11229
[7]   NEUTRON-DIFFRACTION STUDY OF PR VALENCE AND OXYGEN ORDERING IN THE Y1-XPRXBA2CU3O7-DELTA SYSTEM [J].
NEUMEIER, JJ ;
BJORNHOLM, T ;
MAPLE, MB ;
RHYNE, JJ ;
GOTAAS, JA .
PHYSICA C, 1990, 166 (1-2) :191-196
[8]   STRUCTURAL INHOMOGENEITIES IN OXYGEN-DEFICIENT ERBA2CU3O6+X ASSOCIATED WITH THE TETRAGONAL-TO-ORTHORHOMBIC TRANSITION - EVIDENCE OF 1ST-ORDER BEHAVIOR [J].
RADAELLI, PG ;
SEGRE, CU ;
HINKS, DG ;
JORGENSEN, JD .
PHYSICAL REVIEW B, 1992, 45 (09) :4923-4949
[9]   NEUTRON-DIFFRACTION STUDY OF ERBA2CU3OX IN THE COMPOSITION RANGE 6.1LESS-THAN-OR-EQUAL-TOXLESS-THAN-OR-EQUAL-TO7.0 [J].
RUPP, B ;
PORSCHKE, E ;
MEUFFELS, P ;
FISCHER, P ;
ALLENSPACH, P .
PHYSICAL REVIEW B, 1989, 40 (07) :4472-4477
[10]   A VERSATILE DOUBLE-AXIS MULTICOUNTER NEUTRON POWDER DIFFRACTOMETER [J].
SCHEFER, J ;
FISCHER, P ;
HEER, H ;
ISACSON, A ;
KOCH, M ;
THUT, R .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1990, 288 (2-3) :477-485