TY - JOUR
T1 - Phase Transition and Spin-gap Behavior in a Layered Tetragonal Pnictide Oxide
AU - Axtell, E. A.
AU - Ozawa, Tadashi
AU - Kauzlarich, Susan M.
AU - Singh, Rajiv R P
PY - 1997/12
Y1 - 1997/12
N2 - 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.
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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U2 - 10.1006/jssc.1997.7715
DO - 10.1006/jssc.1997.7715
M3 - Article
AN - SCOPUS:0000799547
VL - 134
SP - 423
EP - 426
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
IS - 2
ER -