Magnetization and spin dynamics of a Cr-based magnetic cluster: Cr7 Ni

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

doi:10.1016/j.jmmm.2009.03.006

Magnetization and spin dynamics of a Cr-based magnetic cluster: Cr₇ Ni

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

Materials Property Division

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We study the magnetization and the spin dynamics of the Cr₇ 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 Cr₇ 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 / T₁ directly probes such fluctuations, and allows to determine the magnetoelastic coupling strength.

Original language	English
Pages (from-to)	1262-1264
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	322
Issue number	9-12
DOIs	https://doi.org/10.1016/j.jmmm.2009.03.006
Publication status	Published - 2010 May

Keywords

Magnetic molecules
NMR
Relaxation dynamics

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2009.03.006

Cite this

Bianchi, A., Carretta, S., Santini, P., Amoretti, G., Furukawa, Y., Kiuchi, K., Ajiro, Y., Narumi, Y., Kindo, K., Lago, J., Micotti, E., Arosio, P., Lascialfari, A., Borsa, F., Timco, G., & Winpenny, R. E. P. (2010). Magnetization and spin dynamics of a Cr-based magnetic cluster: Cr₇ Ni. Journal of Magnetism and Magnetic Materials, 322(9-12), 1262-1264. https://doi.org/10.1016/j.jmmm.2009.03.006

Bianchi, A, Carretta, S, Santini, P, Amoretti, G, Furukawa, Y, Kiuchi, K, Ajiro, Y, Narumi, Y, Kindo, K, Lago, J, Micotti, E, Arosio, P, Lascialfari, A, Borsa, F, Timco, G & Winpenny, REP 2010, 'Magnetization and spin dynamics of a Cr-based magnetic cluster: Cr₇ Ni', Journal of Magnetism and Magnetic Materials, vol. 322, no. 9-12, pp. 1262-1264. https://doi.org/10.1016/j.jmmm.2009.03.006

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abstract = "We study the magnetization and the spin dynamics of the Cr7 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 Cr7 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 / T1 directly probes such fluctuations, and allows to determine the magnetoelastic coupling strength.",

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AU - Bianchi, A.

AU - Carretta, S.

AU - Santini, P.

AU - Amoretti, G.

AU - Furukawa, Y.

AU - Kiuchi, K.

AU - Ajiro, Y.

AU - Narumi, Y.

AU - Kindo, K.

AU - Lago, J.

AU - Micotti, E.

AU - Arosio, P.

AU - Lascialfari, A.

AU - Borsa, F.

AU - Timco, G.

AU - Winpenny, R. E.P.

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AB - We study the magnetization and the spin dynamics of the Cr7 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 Cr7 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 / T1 directly probes such fluctuations, and allows to determine the magnetoelastic coupling strength.

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