Spin relaxation in Mn-12-acetate

Leuenberger, M. N. and Loss, D.. (1999) Spin relaxation in Mn-12-acetate. Europhysics Letters, Vol. 46, H. 5. pp. 692-698.

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Official URL: http://edoc.unibas.ch/dok/A5254758

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We present a comprehensive theory of the magnetization relaxation in a Mn-12-acetate crystal based on thermally assisted spin tunneling induced by quartic anisotropy and weak transverse magnetic fields. The overall relaxation rate as a function of the magnetic field is calculated and shown to agree well with data including all resonance peaks. The Lorentzian shape of the resonances is also in good agreement with recent data. A generalised master equation including resonances is derived and solved exactly. It is shown that many transition paths with comparable weight exist that contribute to the relaxation process. Previously unknown spin-phonon coupling constants are calculated explicitly.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Les ├ęditions de physique
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:44

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