Volume 60, Number 5, December 2002
|Page(s)||768 - 774|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2002|
Tunneling splittings in -acetate single crystals
Department of Physics, New York University
4 Washington Place, New York, NY 10003, USA
2 Department of Chemistry and Biochemistry, University of California San Diego La Jolla, CA 92093-0358, USA
3 Department of Chemistry, University of Florida - Gainsville, FL 32611-7200, USA
Accepted: 24 September 2002
A Landau-Zener multi-crossing method has been used to investigate the tunnel splittings in high-quality -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.
PACS: 75.45.+j – Macroscopic quantum phenomena in magnetic systems / 75.50.Tt – Fine-particle systems; nanocrystalline materials
© EDP Sciences, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.