One-Third Magnetization Plateau with a Preceding Novel Phase in Volborthite

被引：78

作者：

Ishikawa, H. ^{[1
]}

Yoshida, M. ^{[1
]}

Nawa, K. ^{[1
]}

Jeong, M. ^{[2
,3
]}

Kraemer, S. ^{[2
,3
]}

Horvatic, M. ^{[2
,3
]}

Berthier, C. ^{[2
,3
]}

Takigawa, M. ^{[1
]}

Akaki, M. ^{[1
]}

Miyake, A. ^{[1
]}

Tokunaga, M. ^{[1
]}

Kindo, K. ^{[1
]}

Yamaura, J. ^{[4
]}

Okamoto, Y. ^{[1
,5
]}

Hiroi, Z. ^{[1
]}

机构：

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

[2] UPS, CNRS, LNCMI, UJF,UPR3228, F-38042 Grenoble 9, France

[3] INSA, F-38042 Grenoble 9, France

[4] Tokyo Inst Technol, Mat Res Ctr Element Strategy, Yokohama, Kanagawa 2268503, Japan

[5] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 22期

基金：

日本学术振兴会;

关键词：

KAGOME HEISENBERG-ANTIFERROMAGNET; LIQUIDS; CHAINS; STATES; FIELD;

D O I：

10.1103/PhysRevLett.114.227202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have synthesized high-quality single crystals of volborthite, a seemingly distorted kagome antiferromagnet, and carried out high-field magnetization measurements up to 74 T and V-51 NMR measurements up to 30 T. An extremely wide 1/3 magnetization plateau appears above 28 T and continues over 74 T at 1.4 K, which has not been observed in previous studies using polycrystalline samples. NMR spectra reveal an incommensurate order (most likely a spin-density wave order) below 22 T and a simple spin structure in the plateau phase. Moreover, a novel intermediate phase is found between 23 and 26 T, where the magnetization varies linearly with magnetic field and the NMR spectra indicate an inhomogeneous distribution of the internal magnetic field. This sequence of phases in volborthite bears a striking similarity to those of frustrated spin chains with a ferromagnetic nearest-neighbor coupling J(1) competing with an antiferromagnetic next-nearest-neighbor coupling J(2)

引用

页数：5

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