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

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