Li-NMR study of Spin liquid state due to orbital fluctuation in LiNio 2

Tatsuya Fujimoto, Guo-Qing Zheng, Yoshio Kitaoka, Atsushi Hirano, Ryoji Kanno, Mikio Takano

Research output: Contribution to journalArticle

Abstract

We report magnetic field (H) effect on the unconventional magnetism in LiNiO2 that consists of a spin-1/2 triangular (TRI) lattice through the 7Li nuclear spin lattice relaxation (1/T1) and NMR intensity measurements. Instead of a ferromagnetic (FM) ground state expected from the FM-Weiss constant, a marginal ordered state emerges below TM sim 20 K, evidenced from the wipe-out effect of 7Li-NMR signal and the divergent behavior of 1/T1 towards TM- The existence of the strong antiferromagnetic (AF) interaction along with the FM one is concluded to lead to a magnetically frustrated state at low temperatures and its AF exchange constant JAF is estimated to be about -20 K. This marginal ordered state due to the frustration of the antiferro-orbital order is found to be suppressed by applying H exceeding 10 T, revealing an orbital exchange constant J° ∼ -10 K. In the paramagnetic regime at high temperatures, the system behaves like an assembly of local moments with an exchange frequency wex sim 11 K, consistent with the energy scale of \J°;\∼10 K. The present experiments have revealed that

Original languageEnglish
Pages (from-to)169-171
Number of pages3
JournalJournal of the Physical Society of Japan
Volume71
Issue numberSUPPL.
Publication statusPublished - 2002
Externally publishedYes

Fingerprint

orbitals
nuclear magnetic resonance
liquids
frustration
spin-lattice relaxation
nuclear spin
assembly
moments
ground state
magnetic fields
energy

Keywords

  • Frustration
  • NMR
  • Orbital degrees of freedom
  • Spin liquid state
  • Triangular lattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Fujimoto, T., Zheng, G-Q., Kitaoka, Y., Hirano, A., Kanno, R., & Takano, M. (2002). Li-NMR study of Spin liquid state due to orbital fluctuation in LiNio 2. Journal of the Physical Society of Japan, 71(SUPPL.), 169-171.

Li-NMR study of Spin liquid state due to orbital fluctuation in LiNio 2. / Fujimoto, Tatsuya; Zheng, Guo-Qing; Kitaoka, Yoshio; Hirano, Atsushi; Kanno, Ryoji; Takano, Mikio.

In: Journal of the Physical Society of Japan, Vol. 71, No. SUPPL., 2002, p. 169-171.

Research output: Contribution to journalArticle

Fujimoto, T, Zheng, G-Q, Kitaoka, Y, Hirano, A, Kanno, R & Takano, M 2002, 'Li-NMR study of Spin liquid state due to orbital fluctuation in LiNio 2', Journal of the Physical Society of Japan, vol. 71, no. SUPPL., pp. 169-171.
Fujimoto, Tatsuya ; Zheng, Guo-Qing ; Kitaoka, Yoshio ; Hirano, Atsushi ; Kanno, Ryoji ; Takano, Mikio. / Li-NMR study of Spin liquid state due to orbital fluctuation in LiNio 2. In: Journal of the Physical Society of Japan. 2002 ; Vol. 71, No. SUPPL. pp. 169-171.
@article{910d032ebeff4205a8e0c2a4a0e7e2f6,
title = "Li-NMR study of Spin liquid state due to orbital fluctuation in LiNio 2",
abstract = "We report magnetic field (H) effect on the unconventional magnetism in LiNiO2 that consists of a spin-1/2 triangular (TRI) lattice through the 7Li nuclear spin lattice relaxation (1/T1) and NMR intensity measurements. Instead of a ferromagnetic (FM) ground state expected from the FM-Weiss constant, a marginal ordered state emerges below TM sim 20 K, evidenced from the wipe-out effect of 7Li-NMR signal and the divergent behavior of 1/T1 towards TM- The existence of the strong antiferromagnetic (AF) interaction along with the FM one is concluded to lead to a magnetically frustrated state at low temperatures and its AF exchange constant JAF is estimated to be about -20 K. This marginal ordered state due to the frustration of the antiferro-orbital order is found to be suppressed by applying H exceeding 10 T, revealing an orbital exchange constant J° ∼ -10 K. In the paramagnetic regime at high temperatures, the system behaves like an assembly of local moments with an exchange frequency wex sim 11 K, consistent with the energy scale of \J°;\∼10 K. The present experiments have revealed that",
keywords = "Frustration, NMR, Orbital degrees of freedom, Spin liquid state, Triangular lattice",
author = "Tatsuya Fujimoto and Guo-Qing Zheng and Yoshio Kitaoka and Atsushi Hirano and Ryoji Kanno and Mikio Takano",
year = "2002",
language = "English",
volume = "71",
pages = "169--171",
journal = "Journal of the Physical Society of Japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "SUPPL.",

}

TY - JOUR

T1 - Li-NMR study of Spin liquid state due to orbital fluctuation in LiNio 2

AU - Fujimoto, Tatsuya

AU - Zheng, Guo-Qing

AU - Kitaoka, Yoshio

AU - Hirano, Atsushi

AU - Kanno, Ryoji

AU - Takano, Mikio

PY - 2002

Y1 - 2002

N2 - We report magnetic field (H) effect on the unconventional magnetism in LiNiO2 that consists of a spin-1/2 triangular (TRI) lattice through the 7Li nuclear spin lattice relaxation (1/T1) and NMR intensity measurements. Instead of a ferromagnetic (FM) ground state expected from the FM-Weiss constant, a marginal ordered state emerges below TM sim 20 K, evidenced from the wipe-out effect of 7Li-NMR signal and the divergent behavior of 1/T1 towards TM- The existence of the strong antiferromagnetic (AF) interaction along with the FM one is concluded to lead to a magnetically frustrated state at low temperatures and its AF exchange constant JAF is estimated to be about -20 K. This marginal ordered state due to the frustration of the antiferro-orbital order is found to be suppressed by applying H exceeding 10 T, revealing an orbital exchange constant J° ∼ -10 K. In the paramagnetic regime at high temperatures, the system behaves like an assembly of local moments with an exchange frequency wex sim 11 K, consistent with the energy scale of \J°;\∼10 K. The present experiments have revealed that

AB - We report magnetic field (H) effect on the unconventional magnetism in LiNiO2 that consists of a spin-1/2 triangular (TRI) lattice through the 7Li nuclear spin lattice relaxation (1/T1) and NMR intensity measurements. Instead of a ferromagnetic (FM) ground state expected from the FM-Weiss constant, a marginal ordered state emerges below TM sim 20 K, evidenced from the wipe-out effect of 7Li-NMR signal and the divergent behavior of 1/T1 towards TM- The existence of the strong antiferromagnetic (AF) interaction along with the FM one is concluded to lead to a magnetically frustrated state at low temperatures and its AF exchange constant JAF is estimated to be about -20 K. This marginal ordered state due to the frustration of the antiferro-orbital order is found to be suppressed by applying H exceeding 10 T, revealing an orbital exchange constant J° ∼ -10 K. In the paramagnetic regime at high temperatures, the system behaves like an assembly of local moments with an exchange frequency wex sim 11 K, consistent with the energy scale of \J°;\∼10 K. The present experiments have revealed that

KW - Frustration

KW - NMR

KW - Orbital degrees of freedom

KW - Spin liquid state

KW - Triangular lattice

UR - http://www.scopus.com/inward/record.url?scp=70349414790&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70349414790&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:70349414790

VL - 71

SP - 169

EP - 171

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - SUPPL.

ER -