Magnetization and spin dynamics of a Cr-based magnetic cluster: Cr 7 Ni

A. Bianchi, S. Carretta, P. Santini, G. Amoretti, Y. Furukawa, K. Kiuchi, Y. Ajiro, Yasuo Narumi, K. Kindo, J. Lago, E. Micotti, P. Arosio, A. Lascialfari, F. Borsa, G. Timco, R. E.P. Winpenny

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We study the magnetization and the spin dynamics of the Cr 7 Ni ring-shaped magnetic cluster. Measurements of the magnetization at high pulsed fields and low temperature are compared to calculations and show that the spin Hamiltonian approach provides a good description of the Cr 7 Ni magnetic molecule. In addition, the phonon-induced relaxation dynamics of molecular observables has been investigated. By assuming the spin-phonon coupling to take place through the modulation of the local crystal fields, it is possible to evaluate the decay of fluctuations of two generic molecular observables. The nuclear spin-lattice relaxation rate 1 / T 1 directly probes such fluctuations, and allows to determine the magnetoelastic coupling strength.

Original languageEnglish
Pages (from-to)1262-1264
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume322
Issue number9-12
DOIs
Publication statusPublished - 2010 May 1

Keywords

  • Magnetic molecules
  • NMR
  • Relaxation dynamics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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