Structural, Transport and Magnetic Properties of KxCoO2 (x=0.36)
FU Guang-Cai1,2, DONG Cheng1, LI Ming-Xing2, GUO Juan1, YANG Li-Hong1
1National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
2Department of Chemistry, Shanghai University, Shanghai 200436
Structural, Transport and Magnetic Properties of KxCoO2 (x=0.36)
FU Guang-Cai1,2;DONG Cheng1;LI Ming-Xing2;GUO Juan1;YANG Li-Hong1
1National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
2Department of Chemistry, Shanghai University, Shanghai 200436
Abstract： Layered potassium cobaltate KxCoO2 with x=0.36 has been successfully synthesized in KOH fluxes at 480°C , and its hydrated form K0.36CoO2`yH2O (y≤0.8) has been obtained by intercalation with water. The diffraction peaks of K0.36CoO2 can be indexed by an orthorhombic cell similar to Na0.5CoO2, and K0.36CoO2`0.8H2O is isostructural with its sodium analog, monolayer hydrate NaxCoO2`yH2O. While the samples KxCoO2 and K0.36CoO2 yH2O (y <0.8) show semiconductor behaviour, a metal-insulator transition around 30K was observed in the sample KxCoO2`0.8H2O. Both the samples show complicated magnetic behaviour, and they are primarily paramagnetic in the range from 5K to 300K with a spin-glass-like transition around 56K.
(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
引用本文:
FU Guang-Cai;DONG Cheng;LI Ming-Xing;GUO Juan;YANG Li-Hong. Structural, Transport and Magnetic Properties of KxCoO2 (x=0.36)[J]. 中国物理快报, 2005, 22(6): 1478-1480.
FU Guang-Cai, DONG Cheng, LI Ming-Xing, GUO Juan, YANG Li-Hong. Structural, Transport and Magnetic Properties of KxCoO2 (x=0.36). Chin. Phys. Lett., 2005, 22(6): 1478-1480.
2005, Vol. 22 
