Li7RuO6: As a 4d Heisenberg frustrated magnet

Kanako Nakajima; Hirohiko Sato; Tomoya Fukui; Masahiro Iwaki; Yasuo Narumi; Koichi Kindo; Yutaka Itoh; Chishiro Michioka; Kazuyoshi Yoshimura

doi:10.1143/JPSJ.79.064705

Li₇RuO₆: As a 4d Heisenberg frustrated magnet

Kanako Nakajima, Hirohiko Sato, Tomoya Fukui, Masahiro Iwaki, Yasuo Narumi, Koichi Kindo, Yutaka Itoh, Chishiro Michioka, Kazuyoshi Yoshimura

Materials Property Division

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

2 Citations (Scopus)

Abstract

The structural and magnetic properties of Li₇RuO₆ were investigated in single crystals. This ruthenate is composed of quasi-two-dimensional distorted triangular lattices of RuO₆ octahedra isolated from each other. Because of the (t_2g)³ electron con.guration of Ru⁵⁺, a Heisenberg-type magnetic behavior of S = 3/2 spins is expected. The magnetic susceptibility reveals an antiferromagnetic transition at T_N = 6:5 K, much lower than the absolute value of the Weiss temperature Θ =-75 K, indicating a strong geometric frustration. The small and almost isotropic drop of the susceptibility below T_N suggests a helical magnetic structure. Specific heat revealed an additional phase transition at T'_N = 12 K, suggesting an unconventional magnetic phase diagram.

Original language	English
Article number	064705
Journal	journal of the physical society of japan
Volume	79
Issue number	6
DOIs	https://doi.org/10.1143/JPSJ.79.064705
Publication status	Published - 2010 Jun

Keywords

Frustration
Magnetism
Ruthenate
Transition metal oxide
Triangular lattice
Two-dimensional

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.79.064705

Cite this

@article{917af2d8070144cca42ffa71f45b1d96,

title = "Li7RuO6: As a 4d Heisenberg frustrated magnet",

abstract = "The structural and magnetic properties of Li7RuO6 were investigated in single crystals. This ruthenate is composed of quasi-two-dimensional distorted triangular lattices of RuO6 octahedra isolated from each other. Because of the (t2g)3 electron con.guration of Ru5+, a Heisenberg-type magnetic behavior of S = 3/2 spins is expected. The magnetic susceptibility reveals an antiferromagnetic transition at TN = 6:5 K, much lower than the absolute value of the Weiss temperature Θ =-75 K, indicating a strong geometric frustration. The small and almost isotropic drop of the susceptibility below TN suggests a helical magnetic structure. Specific heat revealed an additional phase transition at T'N = 12 K, suggesting an unconventional magnetic phase diagram.",

keywords = "Frustration, Magnetism, Ruthenate, Transition metal oxide, Triangular lattice, Two-dimensional",

author = "Kanako Nakajima and Hirohiko Sato and Tomoya Fukui and Masahiro Iwaki and Yasuo Narumi and Koichi Kindo and Yutaka Itoh and Chishiro Michioka and Kazuyoshi Yoshimura",

year = "2010",

month = jun,

doi = "10.1143/JPSJ.79.064705",

language = "English",

volume = "79",

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

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "6",

}

TY - JOUR

T1 - Li7RuO6

T2 - As a 4d Heisenberg frustrated magnet

AU - Nakajima, Kanako

AU - Sato, Hirohiko

AU - Fukui, Tomoya

AU - Iwaki, Masahiro

AU - Narumi, Yasuo

AU - Kindo, Koichi

AU - Itoh, Yutaka

AU - Michioka, Chishiro

AU - Yoshimura, Kazuyoshi

PY - 2010/6

Y1 - 2010/6

N2 - The structural and magnetic properties of Li7RuO6 were investigated in single crystals. This ruthenate is composed of quasi-two-dimensional distorted triangular lattices of RuO6 octahedra isolated from each other. Because of the (t2g)3 electron con.guration of Ru5+, a Heisenberg-type magnetic behavior of S = 3/2 spins is expected. The magnetic susceptibility reveals an antiferromagnetic transition at TN = 6:5 K, much lower than the absolute value of the Weiss temperature Θ =-75 K, indicating a strong geometric frustration. The small and almost isotropic drop of the susceptibility below TN suggests a helical magnetic structure. Specific heat revealed an additional phase transition at T'N = 12 K, suggesting an unconventional magnetic phase diagram.

AB - The structural and magnetic properties of Li7RuO6 were investigated in single crystals. This ruthenate is composed of quasi-two-dimensional distorted triangular lattices of RuO6 octahedra isolated from each other. Because of the (t2g)3 electron con.guration of Ru5+, a Heisenberg-type magnetic behavior of S = 3/2 spins is expected. The magnetic susceptibility reveals an antiferromagnetic transition at TN = 6:5 K, much lower than the absolute value of the Weiss temperature Θ =-75 K, indicating a strong geometric frustration. The small and almost isotropic drop of the susceptibility below TN suggests a helical magnetic structure. Specific heat revealed an additional phase transition at T'N = 12 K, suggesting an unconventional magnetic phase diagram.

KW - Frustration

KW - Magnetism

KW - Ruthenate

KW - Transition metal oxide

KW - Triangular lattice

KW - Two-dimensional

UR - http://www.scopus.com/inward/record.url?scp=77953224203&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953224203&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.79.064705

DO - 10.1143/JPSJ.79.064705

M3 - Article

AN - SCOPUS:77953224203

SN - 0031-9015

VL - 79

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 6

M1 - 064705

ER -