Exchange interactions at the origin of slow relaxation of the magnetization in {TbCu₃} and {DyCu₃} single-molecule magnets

Kettles, F. J., Milway, V. A., Tuna, F., Valiente, R., Thomas, L. H., Wernsdorfer, W., Ochsenbein, S. T. and Murrie, M. (2014) Exchange interactions at the origin of slow relaxation of the magnetization in {TbCu₃} and {DyCu₃} single-molecule magnets. Inorganic Chemistry, 53(17), pp. 8970-8978. (doi: 10.1021/ic500885r)

Abstract

We have determined the exchange interactions in new {TbCu₃} and {DyCu₃} SMMs, with inelastic neutron scattering (INS) spectroscopy. We found that the fundamental INS excitations correspond to CuII spin flips. These have energies similar to the thermodynamic barriers for magnetization reversal, which we determined using ac magnetic susceptibility measurements. This indicates the importance of these spin flips for the magnetic relaxation and therefore the importance of the 3d−4f exchange interactions for the thermodynamic energy barrier.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Thomas, Dr Lynne and Milway, Dr Victoria and Murrie, Professor Mark
• Authors: Kettles, F. J., Milway, V. A., Tuna, F., Valiente, R., Thomas, L. H., Wernsdorfer, W., Ochsenbein, S. T., and Murrie, M.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Inorganic Chemistry
• Publisher: American Chemical Society
• ISSN: 0020-1669
• ISSN (Online): 1520-510X
• Copyright Holders: Copyright © 2014 The Authors
• First Published: First published in Inorganic Chemistry 53(17):8970-8978
• Publisher Policy: Reproduced under a Creative Commons License

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
55588	1	Atom-by-atom control for the targeted chemical synthesis of heterometallic molecular nanomagnets	Mark Murrie	Engineering & Physical Sciences Research Council (EPSRC)	EP/I027203/1	CHEM - CHEMISTRY