Insulator-metal transition in BaCo0.9Ni0.1S2-ySey

J. W. Schweitzer; L. S. Martinson; N. C. Baenziger; D. C. Swenson; Victor G. Young; Ilia Guzei

doi:10.1103/PhysRevB.62.12792

Insulator-metal transition in BaCo_0.9Ni_0.1S_2-ySe_y

J. W. Schweitzer, L. S. Martinson, N. C. Baenziger, D. C. Swenson, Victor G. Young, Ilia Guzei

Chemistry (Twin Cities)

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Abstract

Compounds of the Se-doped layered transition-metal sulfide series BaCo_0.9Ni_0.1S_2-ySe_y (y≤0.4) were prepared and structural, magnetic, and electrical properties were investigated. These compounds exhibit the unusual first-order antiferromagnetic semiconductor to paramagnetic metal transition with decreasing temperature that was previously seen in the sulfur-deficient BaCo_1-xNi_xS_2-y series. This transition is associated with a major structural change. The previously unknown crystal structure of the low-temperature phase is reported. Electrical resistance and magnetic susceptibility measurements are used to construct the phase diagram for BaCo_0.9Ni_0.1S_2-ySe_y. Doping with Se increases the insulator-metal transition temperature, but has very little effect on other properties since it substitutes for S only in the BaS layers.

Original language	English (US)
Pages (from-to)	12792-12799
Number of pages	8
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	62
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.62.12792
State	Published - Nov 15 2000

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title = "Insulator-metal transition in BaCo0.9Ni0.1S2-ySey",

abstract = "Compounds of the Se-doped layered transition-metal sulfide series BaCo0.9Ni0.1S2-ySey (y≤0.4) were prepared and structural, magnetic, and electrical properties were investigated. These compounds exhibit the unusual first-order antiferromagnetic semiconductor to paramagnetic metal transition with decreasing temperature that was previously seen in the sulfur-deficient BaCo1-xNixS2-y series. This transition is associated with a major structural change. The previously unknown crystal structure of the low-temperature phase is reported. Electrical resistance and magnetic susceptibility measurements are used to construct the phase diagram for BaCo0.9Ni0.1S2-ySey. Doping with Se increases the insulator-metal transition temperature, but has very little effect on other properties since it substitutes for S only in the BaS layers.",

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T1 - Insulator-metal transition in BaCo0.9Ni0.1S2-ySey

AU - Schweitzer, J. W.

AU - Martinson, L. S.

AU - Baenziger, N. C.

AU - Swenson, D. C.

AU - Young, Victor G.

AU - Guzei, Ilia

PY - 2000/11/15

Y1 - 2000/11/15

N2 - Compounds of the Se-doped layered transition-metal sulfide series BaCo0.9Ni0.1S2-ySey (y≤0.4) were prepared and structural, magnetic, and electrical properties were investigated. These compounds exhibit the unusual first-order antiferromagnetic semiconductor to paramagnetic metal transition with decreasing temperature that was previously seen in the sulfur-deficient BaCo1-xNixS2-y series. This transition is associated with a major structural change. The previously unknown crystal structure of the low-temperature phase is reported. Electrical resistance and magnetic susceptibility measurements are used to construct the phase diagram for BaCo0.9Ni0.1S2-ySey. Doping with Se increases the insulator-metal transition temperature, but has very little effect on other properties since it substitutes for S only in the BaS layers.

AB - Compounds of the Se-doped layered transition-metal sulfide series BaCo0.9Ni0.1S2-ySey (y≤0.4) were prepared and structural, magnetic, and electrical properties were investigated. These compounds exhibit the unusual first-order antiferromagnetic semiconductor to paramagnetic metal transition with decreasing temperature that was previously seen in the sulfur-deficient BaCo1-xNixS2-y series. This transition is associated with a major structural change. The previously unknown crystal structure of the low-temperature phase is reported. Electrical resistance and magnetic susceptibility measurements are used to construct the phase diagram for BaCo0.9Ni0.1S2-ySey. Doping with Se increases the insulator-metal transition temperature, but has very little effect on other properties since it substitutes for S only in the BaS layers.

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Insulator-metal transition in BaCo_0.9Ni_0.1S_2-ySe_y

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