PHASE-SEPARATION IN ND2-XCEXCUO4 - EVIDENCE FOR SUPERCONDUCTIVITY AT A SINGLE COMPOSITION

被引：77

作者：

LIGHTFOOT, P ^{[1
]}

RICHARDS, DR ^{[1
]}

DABROWSKI, B ^{[1
]}

HINKS, DG ^{[1
]}

PEI, SY ^{[1
]}

MARX, DT ^{[1
]}

MITCHELL, AW ^{[1
]}

ZHENG, Y ^{[1
]}

JORGENSEN, JD ^{[1
]}

机构：

[1] ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439

来源：

PHYSICA C | 1990年 / 168卷 / 5-6期

关键词：

D O I：

10.1016/0921-4534(90)90087-U

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A series of samples with bulk compositions Nd2-χCeχCuO4, 0≤χ≤0.25, have been examined by pulsed neutron and high-resolution synchrotron X-ray diffraction. The diffraction data show that single phase material is formed only for the undoped compound, Nd2CuO4, and (possibly) for the optimum superconducting composition, χ≈0.165. Other samples appear to be a mixture of this superconducting composition and non-superconducting material of other compositions. The phase separation cannot be explained in the context of an equilibrium phase diagram and, thus, must result from non-equilibrium behavior during synthesis. © 1990.

引用

页码：627 / 636

页数：10

共 26 条

[21] A SUPERCONDUCTING COPPER-OXIDE COMPOUND WITH ELECTRONS AS THE CHARGE-CARRIERS [J].

TOKURA, Y ;

TAKAGI, H ;

UCHIDA, S .

NATURE, 1989, 337 (6205) :345-347

[22] PROBING MAGNETISM AND SUPERCONDUCTIVITY OF HIGH-TC SYSTEMS WITH POSITIVE MUONS [J].

UEMURA, YJ ;

LE, LP ;

LUKE, GM ;

STERNLIEB, BJ ;

BREWER, JH ;

KADONO, R ;

KIEFL, RF ;

KREITZMAN, SR ;

RISEMAN, TM .

PHYSICA C, 1989, 162 :857-860

[23] COMPOSITION-DEPENDENT SUPERCONDUCTIVITY IN LA2-XSRXCUO4-DELTA [J].

VANDOVER, RB ;

CAVA, RJ ;

BATLOGG, B ;

RIETMAN, EA .

PHYSICAL REVIEW B, 1987, 35 (10) :5337-5339

[24] RIETVELD REFINEMENT WITH SPALLATION NEUTRON POWDER DIFFRACTION DATA [J].

VONDREELE, RB ;

JORGENSEN, JD ;

WINDSOR, CG .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1982, 15 (DEC) :581-589

[25] OXYGEN VACANCY ORDERING IN SUPERCONDUCTING ND2-XCEXCUO4-Y [J].

WILLIAMS, T ;

MAENO, Y ;

MANGELSCHOTS, I ;

RELLER, A ;

BEDNORZ, G .

PHYSICA C, 1989, 161 (03) :331-344

[26] PHASE CONSTITUTION AND THERMAL-EXPANSION OF YBA2CU3O7-DELTA SINGLE-CRYSTALS [J].

YOU, HD ;

AXE, JD ;

KAN, XB ;

HASHIMOTO, S ;

MOSS, SC ;

LIU, JZ ;

CRABTREE, GW ;

LAM, DJ .

PHYSICAL REVIEW B, 1988, 38 (13) :9213-9216

← 1 2 3 →