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

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

Research output: Contribution to journalArticle

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 languageEnglish (US)
Pages (from-to)423-426
Number of pages4
JournalJournal of Solid State Chemistry
Volume134
Issue number2
DOIs
StatePublished - Dec 1997

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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