Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn6single-molecule magnets

O. Pieper; T. Guidi; S. Carretta; J. Van Slageren; F. El Hallak; B. Lake; Maria Paola Santini; G. Amoretti; Hannu Mutka; M. Koza; M. Russina; A. Schnegg; Constantinos J Milios; Euan K Brechin; A. Julià; J. Tejada

doi:10.1103/PhysRevB.81.174420

Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn₆single-molecule magnets

O. Pieper, T. Guidi, S. Carretta, J. Van Slageren, F. El Hallak, B. Lake, Maria Paola Santini, G. Amoretti, Hannu Mutka, M. Koza, M. Russina, A. Schnegg, Constantinos J Milios, Euan K Brechin, A. Julià, J. Tejada

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

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Abstract

We investigate the magnetic properties of three Mn6 single-molecule magnets by means of inelastic neutron scattering and frequency domain magnetic resonance spectroscopy. The experimental data reveal that small structural distortions of the molecular geometry produce a significant effect on the energy-level diagram and therefore on the magnetic properties of the molecule. We show that the giant spin model completely fails to describe the spin-level structure of the ground spin multiplets. We analyze theoretically the spin Hamiltonian for the low-spin Mn6 molecule (S=4) and we show that the excited S multiplets play a key role in determining the effective energy barrier for the magnetization reversal, in analogy to what was previously found for the two high spin Mn₆ (S=12) molecules.

Original language	English
Article number	174420
Journal	Physical Review B
Volume	81
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.81.174420
Publication status	Published - 21 May 2010
Externally published	Yes

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10.1103/PhysRevB.81.174420

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Pieper, O., Guidi, T., Carretta, S., Van Slageren, J., El Hallak, F., Lake, B., Santini, M. P., Amoretti, G., Mutka, H., Koza, M., Russina, M., Schnegg, A., Milios, C. J., Brechin, E. K., Julià, A., & Tejada, J. (2010). Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn₆single-molecule magnets. Physical Review B, 81(17), [174420]. https://doi.org/10.1103/PhysRevB.81.174420

Pieper, O. ; Guidi, T. ; Carretta, S. ; Van Slageren, J. ; El Hallak, F. ; Lake, B. ; Santini, Maria Paola ; Amoretti, G. ; Mutka, Hannu ; Koza, M. ; Russina, M. ; Schnegg, A. ; Milios, Constantinos J ; Brechin, Euan K ; Julià, A. ; Tejada, J. / Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn₆single-molecule magnets. In: Physical Review B. 2010 ; Vol. 81, No. 17.

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title = "Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn6single-molecule magnets",

abstract = "We investigate the magnetic properties of three Mn6 single-molecule magnets by means of inelastic neutron scattering and frequency domain magnetic resonance spectroscopy. The experimental data reveal that small structural distortions of the molecular geometry produce a significant effect on the energy-level diagram and therefore on the magnetic properties of the molecule. We show that the giant spin model completely fails to describe the spin-level structure of the ground spin multiplets. We analyze theoretically the spin Hamiltonian for the low-spin Mn6 molecule (S=4) and we show that the excited S multiplets play a key role in determining the effective energy barrier for the magnetization reversal, in analogy to what was previously found for the two high spin Mn6 (S=12) molecules.",

author = "O. Pieper and T. Guidi and S. Carretta and {Van Slageren}, J. and {El Hallak}, F. and B. Lake and Santini, {Maria Paola} and G. Amoretti and Hannu Mutka and M. Koza and M. Russina and A. Schnegg and Milios, {Constantinos J} and Brechin, {Euan K} and A. Juli{\`a} and J. Tejada",

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Pieper, O, Guidi, T, Carretta, S, Van Slageren, J, El Hallak, F, Lake, B, Santini, MP, Amoretti, G, Mutka, H, Koza, M, Russina, M, Schnegg, A, Milios, CJ, Brechin, EK, Julià, A & Tejada, J 2010, 'Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn₆single-molecule magnets', Physical Review B, vol. 81, no. 17, 174420. https://doi.org/10.1103/PhysRevB.81.174420

Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn₆single-molecule magnets. / Pieper, O.; Guidi, T.; Carretta, S.; Van Slageren, J.; El Hallak, F.; Lake, B.; Santini, Maria Paola; Amoretti, G.; Mutka, Hannu; Koza, M.; Russina, M.; Schnegg, A.; Milios, Constantinos J; Brechin, Euan K; Julià, A.; Tejada, J.

In: Physical Review B, Vol. 81, No. 17, 174420, 21.05.2010.

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

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AU - Pieper, O.

AU - Guidi, T.

AU - Carretta, S.

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AU - El Hallak, F.

AU - Lake, B.

AU - Santini, Maria Paola

AU - Amoretti, G.

AU - Mutka, Hannu

AU - Koza, M.

AU - Russina, M.

AU - Schnegg, A.

AU - Milios, Constantinos J

AU - Brechin, Euan K

AU - Julià, A.

AU - Tejada, J.

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AB - We investigate the magnetic properties of three Mn6 single-molecule magnets by means of inelastic neutron scattering and frequency domain magnetic resonance spectroscopy. The experimental data reveal that small structural distortions of the molecular geometry produce a significant effect on the energy-level diagram and therefore on the magnetic properties of the molecule. We show that the giant spin model completely fails to describe the spin-level structure of the ground spin multiplets. We analyze theoretically the spin Hamiltonian for the low-spin Mn6 molecule (S=4) and we show that the excited S multiplets play a key role in determining the effective energy barrier for the magnetization reversal, in analogy to what was previously found for the two high spin Mn6 (S=12) molecules.

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