Crystal structure, magnetic and transport properties of new ruthenate phase, Ba2Ru7O18

被引：1
作者：
Sato, H [1 ]
Ogawa, T [1 ]
Okuda, N [1 ]
Wakabayashi, J [1 ]
机构：
[1] Chuo Univ, Dept Phys, Bunkyo Ku, Tokyo 1128551, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2003年 / 72卷 / 12期
关键词：
transition metal oxide; electron correlation; ruthenate; bad metal non-Fermi liquid; crystal structure; magnetism; electric conduction; porous structure;
D O I：
10.1143/JPSJ.72.3035
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A new phase of ternary ruthenium oxide, Ba2Ru7O18, is discovered. The lattice parameters are: trichnic, a = 6.71(4) Angstrom, b = 7.10(4) Angstrom, c = 7.46(4) Angstrom, alpha = 93.2(2)degrees, beta = 94.6(2)degrees, gamma = 115.7(2)degrees. It has a Ba2Zn7F18-type structure composed of an egde-shared and corner-shared network of RuO6 octahedra. The magnetic susceptibility around room temperature exhibits a Pauli paramagnetism with a relatively large value of X = 3.4 x 10(-4) emu/mol at 300 K, while it exhibits a large temperature dependence in the low temperature range without any evidence of magnetic phase transitions down to 2 K. The resistivity at 300 K is 1.1 X 10(-3) Q CM, larger than that of normal metal. Unlike conventional metals, the resistivity exhibits T-1.2-linear dependence in the low temperature region. These anomalous behaviors of magnetism and resistivity can be interpreted in terms of the non-Fermi liquid state.
引用
收藏
页码：3035 / 3038
页数：4
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