Magnetic properties of one-dimensional quantum spin system Rb2Cu2Mo3O12studied by muon spin relaxation

Seiko Ohira-Kawamura, Keisuke Tomiyasu, Akihiro Koda, Dita P. Sari, Retno Asih, Sungwon Yoon, Isao Watanabe, Kenji Nakajima

Research output: Contribution to journalArticlepeer-review

Abstract

Magnetic properties of a one-dimensional frustrated quantum spin system Rb2Cu2Mo3Oi2is investigated by the muon spin relaxation (pSR) technique. Although this system shows an incommensurate spin correlation in neutron scattering, it has not yet been determined whether the ground state reaches to a nonmagnetic spin-singlet state or not. In this study, our zero-field (ZF) μSR result undoubtedly reveals a nonmagnetic ground state, which establishes formation of the nonmagnetic incommensurate spin-singlet state in combination of the previous neutron scattering study. Furthermore, we found that the internal field is slightly enhanced below ∼ 7 K. This temperature dependence resembles that of electric polarization under the magnetic field reported recently, indicating a possibility that a small change occurs even under ZF. In longitudinal-field measurements, a fast fluctuation around a narrowing region is observed. This relaxation is expected to reflect characteristics of formation of the spin-singlet state.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - 2017 Oct 27
Externally publishedYes

Keywords

  • Muon Spin Relaxation
  • Quantum Spin System

ASJC Scopus subject areas

  • General

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