Local Spin Moment Distribution in Antiferromagnetic Molecular Rings Probed by NMR

E. Micotti, Y. Furukawa, K. Kumagai, S. Carretta, A. Lascialfari, F. Borsa, G. A. Timco, and R. E. P. Winpenny
Phys. Rev. Lett. 97, 267204 – Published 29 December 2006

Abstract

The NMR spectra of F19 and Cr53 have been obtained at low temperatures in a heterometallic substituted antiferromagnetic (AF) ring Cr7Cd with an S=3/2 ground state and compared with the spectra in a homometallic Cr8 AF ring with an S=0 ground state. From the analysis of the spectra one can derive directly model independent values of the staggered nonuniform distribution of the local moment in the heterometallic ring Cr7Cd. The experimental values are found to be in excellent agreement with the theoretical values calculated on the basis of an effective spin Hamiltonian which includes crystal field effects.

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  • Received 13 September 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.267204

©2006 American Physical Society

Authors & Affiliations

E. Micotti1,2,*, Y. Furukawa2, K. Kumagai2, S. Carretta3, A. Lascialfari1,4, F. Borsa1, G. A. Timco5, and R. E. P. Winpenny5

  • 1Department of Physics “A. Volta” and CNR-INFM, Via Bassi 6, I-27100 Pavia, Italy
  • 2Division of Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
  • 3Department of Physics and CNR-INFM, Universitá di Parma, I-43100 Parma, Italy
  • 4Istituto di Fisiologia Generale e Chimica Biologica, Universitá di Milano, I-20134 Milano, CNR-INFM-S3 Modena, Italy
  • 5Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom

  • *Email address: micotti@fisicavolta.unipv.it

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Issue

Vol. 97, Iss. 26 — 31 December 2006

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