Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn-6 single-molecule magnets

O. Pieper; T. Guidi; S. Carretta; J. van Slageren; F. El Hallak; B. Lake; P. Santini; G. Amoretti; H. Mutka; M. Koza; M. Russina; A. Schnegg; C. J. Milios; E. K. Brechin; A. Julia; J. Tejada

doi:10.1103/PhysRevB.81.174420

Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn-6 single-molecule magnets

O. Pieper, T. Guidi, S. Carretta, J. van Slageren, F. El Hallak, B. Lake, P. Santini, G. Amoretti, H. Mutka, M. Koza, M. Russina, A. Schnegg, C. J. Milios, E. K. Brechin, A. Julia, J. Tejada

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

Abstract

We investigate the magnetic properties of three Mn-6 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 Mn-6 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 Mn-6 (S=12) molecules [S. Carretta et al., Phys. Rev. Lett. 100, 157203 (2008)].

Original language	English
Article number	174420
Pages (from-to)	-
Number of pages	12
Journal	Physical review B
Volume	81
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.81.174420
Publication status	Published - 1 May 2010

Keywords / Materials (for Non-textual outputs)

TARGETED STRUCTURAL DISTORTION
JAHN-TELLER ISOMERISM
ANISOTROPY BARRIER
SPIN EXCITATIONS
RELAXATION
CLUSTERS
FAMILY
INTERFERENCE
V-15

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10.1103/PhysRevB.81.174420

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http://prb.aps.org/abstract/PRB/v81/i17/e174420

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Pieper, O., Guidi, T., Carretta, S., van Slageren, J., El Hallak, F., Lake, B., Santini, P., Amoretti, G., Mutka, H., Koza, M., Russina, M., Schnegg, A., Milios, C. J., Brechin, E. K., Julia, A., & Tejada, J. (2010). Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn-6 single-molecule magnets. Physical review B, 81(17), -. Article 174420. https://doi.org/10.1103/PhysRevB.81.174420

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title = "Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn-6 single-molecule magnets",

abstract = "We investigate the magnetic properties of three Mn-6 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 Mn-6 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 Mn-6 (S=12) molecules [S. Carretta et al., Phys. Rev. Lett. 100, 157203 (2008)].",

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Pieper, O, Guidi, T, Carretta, S, van Slageren, J, El Hallak, F, Lake, B, Santini, P, Amoretti, G, Mutka, H, Koza, M, Russina, M, Schnegg, A, Milios, CJ, Brechin, EK, Julia, A & Tejada, J 2010, 'Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn-6 single-molecule magnets', Physical review B, vol. 81, no. 17, 174420, pp. -. https://doi.org/10.1103/PhysRevB.81.174420

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T1 - Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn-6 single-molecule magnets

AU - Pieper, O.

AU - Guidi, T.

AU - Carretta, S.

AU - van Slageren, J.

AU - El Hallak, F.

AU - Lake, B.

AU - Santini, P.

AU - Amoretti, G.

AU - Mutka, H.

AU - Koza, M.

AU - Russina, M.

AU - Schnegg, A.

AU - Milios, C. J.

AU - Brechin, E. K.

AU - Julia, A.

AU - Tejada, J.

PY - 2010/5/1

Y1 - 2010/5/1

N2 - We investigate the magnetic properties of three Mn-6 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 Mn-6 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 Mn-6 (S=12) molecules [S. Carretta et al., Phys. Rev. Lett. 100, 157203 (2008)].

AB - We investigate the magnetic properties of three Mn-6 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 Mn-6 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 Mn-6 (S=12) molecules [S. Carretta et al., Phys. Rev. Lett. 100, 157203 (2008)].

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KW - ANISOTROPY BARRIER

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IS - 17

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Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn-6 single-molecule magnets

Abstract

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Advanced Fellowship : Novel Single-Molecule Magnets

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Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn-6 single-molecule magnets

Abstract

Keywords / Materials (for Non-textual outputs)

Access to Document

Other files and links

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Projects

Advanced Fellowship : Novel Single-Molecule Magnets

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