TIBA1.2LA0.8CUO5 - A SUPERCONDUCTOR PRODUCED BY REDUCTION, RATHER THAN OXIDATION, OF THE CUO2 PLANES

被引：36
作者：
SUBRAMANIAN, MA
KWEI, GH
PARISE, JB
GOLDSTONE, JA
VONDREELE, RB
机构：
[1] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545
[2] SUNY STONY BROOK,INST MINERAL PHYS,STONY BROOK,NY 11794
[3] SUNY STONY BROOK,DEPT EARTH & SPACE SCI,STONY BROOK,NY 11794
来源：
PHYSICA C | 1990年 / 166卷 / 1-2期
关键词：
D O I：
10.1016/0921-4534(90)90546-Q
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Doping of La3+ for Ba2+ in TlBa2CuO5, to introduce holes into the CuO2 planes, leads to superconductivity in the material TlBa1.2La0.8CuO5 (with Tc ≈ 52 K). The structure (P4/mmm) has been refined using neutron powder diffraction data collected at 305 K (a = 3.8479 (3) A ̊ and c = 9.0909 (6) A ̊) and 15 K (a = 3.8444 (1) A ̊ and c = 9.0744 (3) A ̊). An increase in the Cu-O in-plane bond distance from that in TlBa2CuO5 is consistent with a lowering of the formal oxidation state of copper from its value of 3+. Substantial static site disorder is observed in the Tl-O (3) planes, presumably to allow for better Tl3+-O coordination. Examination of the thermal parameters for the CuO6 octahedra shows that this disorder in turn produces a local tilting of the octahedra and a resultant puckering of the CuO2 planes. © 1990.
引用
收藏
页码：19 / 24
页数：6
相关论文
共 32 条
[1]  
BEDNORZ JG, 1986, Z PHYS B, V64, P198
[2]   SHORT-RANGE ORDERING DUE TO DISPLACEMENTS OF THALLIUM AND OXYGEN-ATOMS IN SUPERCONDUCTING TL2BA2CACU2O8 OBSERVED BY PULSED-NEUTRON SCATTERING [J].
DMOWKSI, W ;
TOBY, BH ;
EGAMI, T ;
SUBRAMANIAN, MA ;
GOPALAKRISHNAN, J ;
SLEIGHT, AW .
PHYSICAL REVIEW LETTERS, 1988, 61 (22) :2608-2611
[3]   INCIPIENT MODULATION IN THE NEW HIGH-TEMPERATURE SUPERCONDUCTOR - TL2BA2CACU2O8 [J].
FITZ GERALD, JD ;
WITHERS, RL ;
THOMPSON, JG ;
WALLENBERG, LR ;
ANDERSON, JS ;
HYDE, BG .
PHYSICAL REVIEW LETTERS, 1988, 60 (26) :2797-2799
[4]   MICROSTRUCTURE AND MICROCHEMISTRY OF DEFECTS AND INTERFACES IN TL2BA2CA3CU4O12, TIBA2CA4CU5O13 AND (TL,PB)SR2CA2-1CU2O2(2)+3, (TL,PB)SR2CA3-1CU3O2(3)+3 OXIDE [J].
GAI, PL ;
SUBRAMANIAN, MA ;
GOPALAKRISHNAN, J ;
BOYES, ED .
PHYSICA C, 1989, 159 (06) :801-810
[5]   BULK SUPERCONDUCTIVITY AT 122-K IN TL(BA,CA)2CA3-CU4O10.5+DELTA WITH 4 CONSECUTIVE COPPER LAYERS [J].
HALDAR, P ;
CHEN, K ;
MAHESWARAN, B ;
ROIG, A ;
JAGGI, NK ;
MARKIEWICZ, RS ;
GIESSEN, BC .
SCIENCE, 1988, 241 (4870) :1198-1200
[6]   THE RELATIONSHIP BETWEEN CHEMICAL-COMPOSITION AND SUPERCONDUCTIVITY IN THE TL-BA-CA-CU-O SUPERCONDUCTORS [J].
HIBBLE, SJ ;
CHEETHAM, AK ;
CHIPPINDALE, AM ;
DAY, P ;
HRILJAC, JA .
PHYSICA C, 1988, 156 (04) :604-606
[7]  
Johnson C.K., 1976, ORNL5138 OAK RIDG NA
[8]  
JUNG D, UNPUB PHYSICA C
[9]  
Kim J., 2014, PREPRINT
[10]  
Larson A. C, 1987, LAUR86748 LOS AL NAT
1234