Phase Transition and Spin-gap Behavior in a Layered Tetragonal Pnictide Oxide

E. A. Axtell; Tadashi Ozawa; Susan M. Kauzlarich; Rajiv R P Singh

doi:10.1006/jssc.1997.7715

Phase Transition and Spin-gap Behavior in a Layered Tetragonal Pnictide Oxide

E. A. Axtell, Tadashi Ozawa, Susan M. Kauzlarich, Rajiv R P Singh

Chemistry

Research output: Contribution to journal › Article

85 Scopus citations

Abstract

Spin-gap behavior has been observed for the first time in the layered tetragonal compound Na₂Ti₂Sb₂O. Na₂Ti₂Sb₂O shows a sharp discontinuity in magnetic susceptibility at 150 K, reminisent of behavior observed in the spin-Peierls compound CuGeO₃. Na₂Ti₂Sb₂O also shows a discontinuity in temperature-dependent resistivity at the magnetic transition and metallic behavior for all other temperatures, 5.7 mΩ·cm at room temperature. Ti-Sb-Ti superexchange is proposed to be favored over Ti-O-Ti superexchange, based on the high-temperature magnetic susceptibility data and on the identity of the magnetic orbitals.

Original language	English (US)
Pages (from-to)	423-426
Number of pages	4
Journal	Journal of Solid State Chemistry
Volume	134
Issue number	2
DOIs	https://doi.org/10.1006/jssc.1997.7715
State	Published - Dec 1997

ASJC Scopus subject areas

Inorganic Chemistry
Physical and Theoretical Chemistry
Materials Chemistry

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Axtell, E. A., Ozawa, T., Kauzlarich, S. M., & Singh, R. R. P. (1997). Phase Transition and Spin-gap Behavior in a Layered Tetragonal Pnictide Oxide. Journal of Solid State Chemistry, 134(2), 423-426. https://doi.org/10.1006/jssc.1997.7715

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abstract = "Spin-gap behavior has been observed for the first time in the layered tetragonal compound Na2Ti2Sb2O. Na2Ti2Sb2O shows a sharp discontinuity in magnetic susceptibility at 150 K, reminisent of behavior observed in the spin-Peierls compound CuGeO3. Na2Ti2Sb2O also shows a discontinuity in temperature-dependent resistivity at the magnetic transition and metallic behavior for all other temperatures, 5.7 mΩ·cm at room temperature. Ti-Sb-Ti superexchange is proposed to be favored over Ti-O-Ti superexchange, based on the high-temperature magnetic susceptibility data and on the identity of the magnetic orbitals.",

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AB - Spin-gap behavior has been observed for the first time in the layered tetragonal compound Na2Ti2Sb2O. Na2Ti2Sb2O shows a sharp discontinuity in magnetic susceptibility at 150 K, reminisent of behavior observed in the spin-Peierls compound CuGeO3. Na2Ti2Sb2O also shows a discontinuity in temperature-dependent resistivity at the magnetic transition and metallic behavior for all other temperatures, 5.7 mΩ·cm at room temperature. Ti-Sb-Ti superexchange is proposed to be favored over Ti-O-Ti superexchange, based on the high-temperature magnetic susceptibility data and on the identity of the magnetic orbitals.

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