Electrical and magnetic properties of Nb2O5-γ crystallographic shear structures

R.J. Cava; B. Batlogg; J.J. Krajewski; H.F. Poulsen; P. Gammel; W.F. Peck Jr.; L.W. Rupp Jr.

doi:10.1103/PhysRevB.44.6973

Electrical and magnetic properties of Nb₂O₅_-γ crystallographic shear structures

R.J. Cava
, B. Batlogg
, J.J. Krajewski
, H.F. Poulsen
, P. Gammel
, W.F. Peck Jr.
, L.W. Rupp Jr.

Research output: Contribution to journal › Journal article › Research

Abstract

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.

Original language	English
Journal	Physical Review B
Volume	44
Issue number	13
Pages (from-to)	6973-6981
ISSN	2469-9950
DOIs	https://doi.org/10.1103/PhysRevB.44.6973
Publication status	Published - 1991

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title = "Electrical and magnetic properties of Nb2O5-γ crystallographic shear structures",

abstract = "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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T1 - Electrical and magnetic properties of Nb2O5-γ crystallographic shear structures

AU - Cava, R.J.

AU - Batlogg, B.

AU - Krajewski, J.J.

AU - Poulsen, H.F.

AU - Gammel, P.

AU - Peck Jr., W.F.

AU - Rupp Jr., L.W.

PY - 1991

Y1 - 1991

N2 - 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.

AB - 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.

KW - Materialers atomare struktur og egenskaber

U2 - 10.1103/PhysRevB.44.6973

DO - 10.1103/PhysRevB.44.6973

M3 - Journal article

SN - 2469-9950

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EP - 6981

JO - Physical Review B

JF - Physical Review B

IS - 13