Evidence of spin singlet ground state in the frustrated antiferromagnetic ring Cr8 Ni

Yuji Furukawa, Kazuki Kiuchi, Ken Ichi Kumagai, Yoshitami Ajiro, Yasuo Narumi, Masahiro Iwaki, Koichi Kindo, Alberto Bianchi, Stefano Carretta, Paolo Santini, Ferdinando Borsa, Grigore A. Timco, Richard E.P. Winpenny

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The magnetic properties of an odd spin number antiferromagnetic ring Cr8 Ni have been investigated by high-field magnetization, specific-heat, and nuclear-magnetic-resonance measurements at very low temperatures (below 1 K). It is found that the ground state of this frustrated spin ring is a singlet state with total spin value ST =0 and zero expectation value of the local spins. The energy-level structure for low-lying excited total spin state ST ≠ 0 shows a breakdown of the Landé interval rule in agreement with theoretical results. Evidences of sizeable Dzyaloshinski-Moriya interactions have been found in the magnetic-field dependence of low-temperature specific-heat and magnetization data.

Original languageEnglish
Article number134416
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number13
DOIs
Publication statusPublished - 2009 Apr 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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