PURIFICATION AND SINGLE-CRYSTAL GROWTH OF NIOBIUM BY COMBINED ZONE-REFINING AND ELECTROTRANSPORT

被引：4

作者：

MALANG, EU

OGLESBY, CS

SIEGRIST, T

BUCHER, E

机构：

[1] UNIV KONSTANZ,FAK PHYS,D-78434 CONSTANCE,GERMANY

[2] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

PHYSICA B | 1995年 / 204卷 / 1-4期

关键词：

11;

D O I：

10.1016/0921-4526(94)00288-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

High quality, high purity Nb single crystals were produced by combining DC electrotransport with float-zone refining. A significant improvement in residual resistivity ratio, RRR (rho(300 K)/rho(4.2 K) ), and crystal quality is observed when the directions of the applied field and the zone motion are parallel. A reduction in RRR is observed when the directions are opposed, The best crystals produced had RRRs up to 2600, which is nearly a factor of 2 higher than that achieved by zone refinining alone,

引用

页码：363 / 366

页数：4

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