Magnetization "steps" on a kagome lattice in volborthite

Hiroyuki Yoshida; Yoshihiko Okamoto; Takashi Tayama; Toshiro Sakaktbara; Masashi Tokunaga; Akira Matsuo; Yasuo Narumi; Koichi Kindo; Makoto Yoshida; Masashi Takigawa; Zenji Hiroi

doi:10.1143/JPSJ.78.043704

Magnetization "steps" on a kagome lattice in volborthite

Hiroyuki Yoshida, Yoshihiko Okamoto, Takashi Tayama, Toshiro Sakaktbara, Masashi Tokunaga, Akira Matsuo, Yasuo Narumi, Koichi Kindo, Makoto Yoshida, Masashi Takigawa, Zenji Hiroi^*

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

Magnetic properties of the spin-1/2 kagome-like compound volborthite are studied using a highquality polycrystalline sample. It is evidenced from magnetization and specific heat measurements that the spins on the kagome lattice still fluctuate at low temperature, down to T - 60 mK that corresponds to 1/1500 of the nearest-neighbor antiferromagnetic interaction, exhibiting neither a conventional longrange order nor a spin gap. In contrast, ⁵¹ V NMR experiments revealed a sharp peak at 1 K in relaxation rate, which indicates that a certain exotic order occurs. Surprisingly, we have observed three "steps" in magnetization as a function of magnetic field, suggesting that at least four liquid-like or other quantum states exist under magnetic fields.

Original language	English
Article number	043704
Journal	Journal of the Physical Society of Japan
Volume	78
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.78.043704
State	Published - 2009/04

Keywords

Kagome lattice
Magnetization step
Spin liquid
Volborthite

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1143/JPSJ.78.043704

Cite this

@article{744650e679cb4b63a4afb45f088b4b68,

title = "Magnetization {"}steps{"} on a kagome lattice in volborthite",

abstract = "Magnetic properties of the spin-1/2 kagome-like compound volborthite are studied using a highquality polycrystalline sample. It is evidenced from magnetization and specific heat measurements that the spins on the kagome lattice still fluctuate at low temperature, down to T - 60 mK that corresponds to 1/1500 of the nearest-neighbor antiferromagnetic interaction, exhibiting neither a conventional longrange order nor a spin gap. In contrast, 51 V NMR experiments revealed a sharp peak at 1 K in relaxation rate, which indicates that a certain exotic order occurs. Surprisingly, we have observed three {"}steps{"} in magnetization as a function of magnetic field, suggesting that at least four liquid-like or other quantum states exist under magnetic fields.",

keywords = "Kagome lattice, Magnetization step, Spin liquid, Volborthite",

author = "Hiroyuki Yoshida and Yoshihiko Okamoto and Takashi Tayama and Toshiro Sakaktbara and Masashi Tokunaga and Akira Matsuo and Yasuo Narumi and Koichi Kindo and Makoto Yoshida and Masashi Takigawa and Zenji Hiroi",

year = "2009",

month = apr,

doi = "10.1143/JPSJ.78.043704",

language = "英語",

volume = "78",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "The Physical Society of Japan",

number = "4",

}

TY - JOUR

T1 - Magnetization "steps" on a kagome lattice in volborthite

AU - Yoshida, Hiroyuki

AU - Okamoto, Yoshihiko

AU - Tayama, Takashi

AU - Sakaktbara, Toshiro

AU - Tokunaga, Masashi

AU - Matsuo, Akira

AU - Narumi, Yasuo

AU - Kindo, Koichi

AU - Yoshida, Makoto

AU - Takigawa, Masashi

AU - Hiroi, Zenji

PY - 2009/4

Y1 - 2009/4

N2 - Magnetic properties of the spin-1/2 kagome-like compound volborthite are studied using a highquality polycrystalline sample. It is evidenced from magnetization and specific heat measurements that the spins on the kagome lattice still fluctuate at low temperature, down to T - 60 mK that corresponds to 1/1500 of the nearest-neighbor antiferromagnetic interaction, exhibiting neither a conventional longrange order nor a spin gap. In contrast, 51 V NMR experiments revealed a sharp peak at 1 K in relaxation rate, which indicates that a certain exotic order occurs. Surprisingly, we have observed three "steps" in magnetization as a function of magnetic field, suggesting that at least four liquid-like or other quantum states exist under magnetic fields.

AB - Magnetic properties of the spin-1/2 kagome-like compound volborthite are studied using a highquality polycrystalline sample. It is evidenced from magnetization and specific heat measurements that the spins on the kagome lattice still fluctuate at low temperature, down to T - 60 mK that corresponds to 1/1500 of the nearest-neighbor antiferromagnetic interaction, exhibiting neither a conventional longrange order nor a spin gap. In contrast, 51 V NMR experiments revealed a sharp peak at 1 K in relaxation rate, which indicates that a certain exotic order occurs. Surprisingly, we have observed three "steps" in magnetization as a function of magnetic field, suggesting that at least four liquid-like or other quantum states exist under magnetic fields.

KW - Kagome lattice

KW - Magnetization step

KW - Spin liquid

KW - Volborthite

UR - http://www.scopus.com/inward/record.url?scp=67649229313&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.78.043704

DO - 10.1143/JPSJ.78.043704

M3 - 学術論文

AN - SCOPUS:67649229313

SN - 0031-9015

VL - 78

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 4

M1 - 043704

ER -

Magnetization "steps" on a kagome lattice in volborthite

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this