DIRECT OBSERVATION OF MICROSCOPIC INHOMOGENEITIES WITH ENERGY-DISPERSIVE DIFFRACTION OF SYNCHROTRON-PRODUCED X-RAYS

被引：31

作者：

SKELTON, EF

DREWS, AR

OSOFSKY, MS

QADRI, SB

HU, JZ

VANDERAH, TA

PENG, JL

GREENE, RL

机构：

[1] USN,RES LAB,DIV MAT SCI & TECHNOL,WASHINGTON,DC 20375

[2] CARNEGIE INST WASHINGTON,GEOPHYS LAB,WASHINGTON,DC 20015

[3] CARNEGIE INST WASHINGTON,CTR HIGH PRESSURE RES,WASHINGTON,DC 20015

[4] USN,CTR AIR WARFARE,RES DEPT,DIV CHEM,CHINA LAKE,CA 93555

[5] UNIV MARYLAND,DEPT CHEM,CTR SUPERCONDUCT RES,COLL PK,MD 20742

来源：

SCIENCE | 1994年 / 263卷 / 5152期

关键词：

D O I：

10.1126/science.263.5152.1416

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Evidence of structural inhomogeneities in two high-transition-temperature superconductors, YBa2CU3O7-delta and Nd2-xCexCuO4-y, is presented. When samples were illuminated by highly collimated x-rays produced on a synchrotron wiggler, small changes in the lattice were detected over a spatial scale of 10 micrometers. These changes are interpreted as evidence of variations in the oxygen content in one case and in the cerium content in the other; both affect the superconducting properties. The existence of such structural inhomogeneities brings into question whether exotic experimental results obtained from superconducting materials with high transition temperatures actually reflect intrinsic properties.

引用

页码：1416 / 1418

页数：3

共 10 条

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ANLAGE SM, UNPUB

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