Quantum Magnetization Plateau in Spin-1 Triangular-Lattice Antiferromagnet Ba3NiSb2O9

被引：49
|
作者：
Shirata, Yutaka [1 ]
Tanaka, Hidekazu [1 ]
Ono, Toshio [2 ]
Matsuo, Akira [3 ]
Kindo, Koichi [3 ]
Nakano, Hiroki [4 ]
机构：
[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan
[2] Osaka Prefecture Univ, Dept Phys Sci, Sakai, Osaka 5998531, Japan
[3] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan
[4] Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2011年 / 80卷 / 09期
基金：
日本学术振兴会;
关键词：
Ba3NiSb2O9; triangular-lattice antiferromagnet; magnetization plateau; PHASE-TRANSITIONS; HEISENBERG ANTIFERROMAGNETS; DISORDER; MN; CO;
D O I：
10.1143/JPSJ.80.093702
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report the results of magnetization and specific heat measurements on Ba3NiSb2O9, which is a quasi-two-dimensional spin-1 triangular-lattice antiferromagnet. We observed a nonclassical magnetization plateau at one-third of the saturation magnetization that is driven by spin frustration and quantum fluctuation. Exact diagonalization for a 21-site rhombic cluster was performed to analyze the magnetization process. Experimental and calculated results agree well.
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页数：4
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