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High-Pressure Synthesis and the Magnetic Properties of Chromium Diantimonide

Published online by Cambridge University Press:  10 February 2011

H. Takizawa
Affiliation:
Department of Materials Chemistry, Tohoku University, Aoba-ku, Sendai 980–77, Japan, [email protected]
K. Uheda
Affiliation:
Department of Materials Chemistry, Tohoku University, Aoba-ku, Sendai 980–77, Japan, [email protected]
T. Endo
Affiliation:
Department of Materials Chemistry, Tohoku University, Aoba-ku, Sendai 980–77, Japan, [email protected]
M. Shimada
Affiliation:
Institute for Advanced Materials Processing, Tohoku University, Aoba-ku, Sendai 980–77, Japan
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Abstract

A new high-pressure polymorph of CrSb2 was synthesized under high-pressure/ temperature conditions of 7–7.7 GPa and 600–650°C. The crystal structure is body-centered tetragonal with the space group 14/mcm, which is assigned to CuAl2-type structure. The experiments under various pressure conditions revealed that the high-pressure polymorph was formed above 5.5 GPa, and the compound crystallized into the low-pressure marcasite-type structure below 5 GPa. The characteristic of the high-pressure phase is the metallic bond nature including the formation of Cr-Cr-Cr linear chain along the c-axis. The compound shows metallic conductivity and itinerant-electron ferromagnetic behavior with the Curie temperature of ca. 160 K.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

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