Tunneling splittings in Mn12-acetate single crystals

E. Del Barco; A. D. Kent; E. M. Rumberger; D. N. Hendrickson; G. Christou

doi:10.1209/epl/i2002-00374-9

Tunneling splittings in Mn₁₂-acetate single crystals

E. Del Barco, A. D. Kent, E. M. Rumberger, D. N. Hendrickson, G. Christou

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

Abstract

A Landau-Zener multi-crossing method has been used to investigate the tunnel splittings in high-quality Mn₁₂-acetate single crystals in the pure quantum relaxation regime and for fields applied parallel to the magnetic easy axis. With this method several individual tunneling resonances have been studied over a broad range of time scales. The relaxation is found to be non-exponential and a distribution of tunnel splittings is inferred from the data. The distributions suggest that the inhomogeneity in the tunneling rates is due to disorder that produces a non-zero mean value of the average transverse anisotropy, such as in a solvent disorder model. Further, the effect of intermolecular dipolar interaction on the magnetic relaxation has been studied.

Original language	English (US)
Pages (from-to)	768-774
Number of pages	7
Journal	Europhysics Letters
Volume	60
Issue number	5
DOIs	https://doi.org/10.1209/epl/i2002-00374-9
State	Published - Dec 2002

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General Physics and Astronomy

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title = "Tunneling splittings in Mn12-acetate single crystals",

abstract = "A Landau-Zener multi-crossing method has been used to investigate the tunnel splittings in high-quality Mn12-acetate single crystals in the pure quantum relaxation regime and for fields applied parallel to the magnetic easy axis. With this method several individual tunneling resonances have been studied over a broad range of time scales. The relaxation is found to be non-exponential and a distribution of tunnel splittings is inferred from the data. The distributions suggest that the inhomogeneity in the tunneling rates is due to disorder that produces a non-zero mean value of the average transverse anisotropy, such as in a solvent disorder model. Further, the effect of intermolecular dipolar interaction on the magnetic relaxation has been studied.",

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AU - Del Barco, E.

AU - Kent, A. D.

AU - Rumberger, E. M.

AU - Hendrickson, D. N.

AU - Christou, G.

PY - 2002/12

Y1 - 2002/12

N2 - A Landau-Zener multi-crossing method has been used to investigate the tunnel splittings in high-quality Mn12-acetate single crystals in the pure quantum relaxation regime and for fields applied parallel to the magnetic easy axis. With this method several individual tunneling resonances have been studied over a broad range of time scales. The relaxation is found to be non-exponential and a distribution of tunnel splittings is inferred from the data. The distributions suggest that the inhomogeneity in the tunneling rates is due to disorder that produces a non-zero mean value of the average transverse anisotropy, such as in a solvent disorder model. Further, the effect of intermolecular dipolar interaction on the magnetic relaxation has been studied.

AB - A Landau-Zener multi-crossing method has been used to investigate the tunnel splittings in high-quality Mn12-acetate single crystals in the pure quantum relaxation regime and for fields applied parallel to the magnetic easy axis. With this method several individual tunneling resonances have been studied over a broad range of time scales. The relaxation is found to be non-exponential and a distribution of tunnel splittings is inferred from the data. The distributions suggest that the inhomogeneity in the tunneling rates is due to disorder that produces a non-zero mean value of the average transverse anisotropy, such as in a solvent disorder model. Further, the effect of intermolecular dipolar interaction on the magnetic relaxation has been studied.

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Tunneling splittings in Mn₁₂-acetate single crystals

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