Journal article
Electrical and magnetic properties of Nb2O5-γ crystallographic shear structures
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.
Language: | English |
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Year: | 1991 |
Pages: | 6973-6981 |
ISSN: | 1550235x , 10980121 , 24699950 , 10953795 and 01631829 |
Types: | Journal article |
DOI: | 10.1103/PhysRevB.44.6973 |
ORCIDs: | Poulsen, H.F. |