ELECTRICAL AND MAGNETIC-PROPERTIES OF NB2O5-DELTA CRYSTALLOGRAPHIC SHEAR STRUCTURES

被引:88
作者
CAVA, RJ
BATLOGG, B
KRAJEWSKI, JJ
POULSEN, HF
GAMMEL, P
PECK, WF
RUPP, LW
机构
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 13期
关键词
D O I
10.1103/PhysRevB.44.6973
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The reduced niobium oxides Nb25O62, Nb47O116, Nb22O54, and Nb12O29 have been prepared in pure polycrystalline form by a niobium-metal gettering technique. They are related to the high niobia parent structure through the action of cystallographic shear to accommodate oxygen deficiency in Nb2O5-delta. Electrical conductivities increase with increasing reduction: Nb12O29 is a metallic conductor down to 0.3 K. All show, surprisingly, Curie-Weiss behavior in the chi-vs-T curves, with Nb12O29 ordering antiferromagnetically at 12 K.
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页码:6973 / 6981
页数:9
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