Magnetization plateaus in NH4CuCl3

被引：164

作者：

Shiramura, W

Takatsu, K

Kurniawan, B

Tanaka, H ^{[1
]}

Uekusa, H

Ohashi, Y

Takizawa, K

Mitamura, H

Goto, T

机构：

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

[2] Sophia Univ, Dept Phys, Chiyoda Ku, Tokyo 1028554, Japan

[3] Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan

[4] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1068666, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 05期

关键词：

NH4CuCl3; double chain; high field; magnetization process; magnetization plateaus;

D O I：

10.1143/JPSJ.67.1548

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic susceptibility and high-field magnetization process of NH4CuCl3 with double chains of CuCl3 have been measured using single crystals. No anomaly indicative of the three-dimensional ordering is observed in susceptibility data above 1.7 K. It is found, by magnetization measurement do cvn to 0.5 IC; that in contrast to KCuCl3 and TlCuCl3, NH4CuCl3 has a gapless magnetic ground state at zero field. It is observed that the magnetization curve has two plateaus at one-quarter and three-quarters of the saturation magnetization; irrespective of the external field direction. The origin of the plateaus is attributed not to the magnetic anisotropy, hut to the quantum effect. The relation between the plateaus and the period of the spin state is discussed in terms of a recent theory presented by Oshikawa et al. [Phys. Rev. Lett. 78 (1997) 1984].

引用

页码：1548 / 1551

页数：4

共 17 条

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