Experimental Realization of a Spin-1/2 Triangular-Lattice Heisenberg Antiferromagnet

被引：268

作者：

Shirata, Yutaka ^{[1
]}

Tanaka, Hidekazu ^{[1
]}

Matsuo, Akira ^{[2
]}

Kindo, Koichi ^{[2
]}

机构：

[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 05期

基金：

日本学术振兴会;

关键词：

HIGH-FIELD MAGNETIZATION; PHASE-TRANSITIONS; CSNICL3; SPECTRA; CSCOCL3; STATES; ORDER; MN; NI; CO;

D O I：

10.1103/PhysRevLett.108.057205

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 Ba3CoSb2O9, in which the magnetic Co2+ ion has a fictitious spin 1/2, and provide evidence that a spin-1/2 Heisenberg anti-ferromagnet on a regular triangular lattice is actually realized in Ba3CoSb2O9. We found that the entire magnetization curve including the one-third quantum magnetization plateau is in excellent quantitative agreement with the results of theoretical calculations. We also found that Ba3CoSb2O9 undergoes a three-step transition within a narrow temperature range.

引用

页数：5

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