Critical slowing down of the spin dynamics in antiferromagnetic rings

D. Procissi*, B. J. Suh, E. Micotti, A. Lascialfari, Y. Furukawa, F. Borsa

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

We report 1H nuclear magnetic resonance spin-lattice relaxation rates T-11 vs. T at different magnetic field values, for molecular antiferromagnetic (AFM) rings with STotal = 0 singlet ground state. New results in {CsFe8}, {Cr8} and {Fe6} are compared with previous results in {Fe6} and {Fe10}. In all cases a strong enhancement of T 1-1 was observed with a maximum occurring at some temperature T0 which is found to be field dependent. It is shown that the critical enhancement appears to be a robust universal feature in these AFM rings for which a general theory is still lacking.

Original languageEnglish (US)
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
DOIs
StatePublished - May 1 2004

Keywords

  • Molecular antiferromagnetic rings
  • Nuclear magnetic resonance
  • Nuclear spin lattice relaxation rate
  • Spin-spin correlation function

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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