Incommensurate transverse anisotropy induced by disorder and spin-orbit-vibron coupling in Mn 12 acetate

Kyungwha Park; Mark R. Pederson; Tunna Baruah; Noam Bernstein; Jens Kortus; Steven L. Richardson; Enrique Del Barco; Andrew D. Kent; Steve Hill; Naresh S. Dalal

doi:10.1063/1.1847851

Incommensurate transverse anisotropy induced by disorder and spin-orbit-vibron coupling in Mn ₁₂ acetate

Kyungwha Park, Mark R. Pederson, Tunna Baruah, Noam Bernstein, Jens Kortus, Steven L. Richardson, Enrique Del Barco, Andrew D. Kent, Steve Hill, Naresh S. Dalal

Research output: Contribution to journal › Article

Abstract

It has been shown within density-functional theory that in Mn12 acetate there are effects due to disorder by solvent molecules and a coupling between vibrational and electronic degrees of freedom. We calculate the in-plane principal axes of the second-order anisotropy caused by the second effect and compare them with those of the fourth-order anisotropy due to the first effect. We find that the two types of the principal axes are not commensurate with each other, which results in a complete quenching of the tunnel-splitting oscillation as a function of an applied transverse field.

Original language	English (US)
Article number	10M505
Journal	Journal of Applied Physics
Volume	97
Issue number	10
DOIs	https://doi.org/10.1063/1.1847851
State	Published - May 15 2005

ASJC Scopus subject areas

Physics and Astronomy(all)

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Park, K., Pederson, M. R., Baruah, T., Bernstein, N., Kortus, J., Richardson, S. L., Del Barco, E., Kent, A. D., Hill, S., & Dalal, N. S. (2005). Incommensurate transverse anisotropy induced by disorder and spin-orbit-vibron coupling in Mn ₁₂ acetate. Journal of Applied Physics, 97(10), [10M505]. https://doi.org/10.1063/1.1847851

Incommensurate transverse anisotropy induced by disorder and spin-orbit-vibron coupling in Mn ₁₂ acetate. / Park, Kyungwha; Pederson, Mark R.; Baruah, Tunna; Bernstein, Noam; Kortus, Jens; Richardson, Steven L.; Del Barco, Enrique; Kent, Andrew D.; Hill, Steve; Dalal, Naresh S.

In: Journal of Applied Physics, Vol. 97, No. 10, 10M505, 15.05.2005.

Research output: Contribution to journal › Article

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abstract = "It has been shown within density-functional theory that in Mn12 acetate there are effects due to disorder by solvent molecules and a coupling between vibrational and electronic degrees of freedom. We calculate the in-plane principal axes of the second-order anisotropy caused by the second effect and compare them with those of the fourth-order anisotropy due to the first effect. We find that the two types of the principal axes are not commensurate with each other, which results in a complete quenching of the tunnel-splitting oscillation as a function of an applied transverse field.",

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AU - Park, Kyungwha

AU - Pederson, Mark R.

AU - Baruah, Tunna

AU - Bernstein, Noam

AU - Kortus, Jens

AU - Richardson, Steven L.

AU - Del Barco, Enrique

AU - Kent, Andrew D.

AU - Hill, Steve

AU - Dalal, Naresh S.

PY - 2005/5/15

Y1 - 2005/5/15

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AB - It has been shown within density-functional theory that in Mn12 acetate there are effects due to disorder by solvent molecules and a coupling between vibrational and electronic degrees of freedom. We calculate the in-plane principal axes of the second-order anisotropy caused by the second effect and compare them with those of the fourth-order anisotropy due to the first effect. We find that the two types of the principal axes are not commensurate with each other, which results in a complete quenching of the tunnel-splitting oscillation as a function of an applied transverse field.

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