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Lecture Joris van Slageren


08 June 2005 FWN-Building 5116.0116, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Joris van Slageren
Affiliation: 1. Physikalisches Institut, Universität Stuttgart
Title: Frequency domain magnetic resonance on molecular magnets
Date: Wed Jun 8, 2005
Start: 11.00
Location: FWN-Building 5116.0116
Host: P.H.M. van Loosdrecht
Telephone: +31 50 363 8149


One of the most important parameters determining the properties of molecular magnets is the magnetic anisotropy in the form of zero-field splitting of the ground spin state. This parameter determines energy barrier and therefore the slow magnetization relaxation dynamics. We have shown over the past years that frequency domain magnetic resonance spectroscopy (FDMRS) is excellently suited to the determination of zero-field splittings. Among its merits are: the lack of necessity of an external magnetic field, and easy access to very large zero-field splittings. Several examples will be shown. The magnetic resonance lineshapes give information on distributions in the sample as well as excited spin state dynamics. Because frequency and magnetic field are independent experimental parameters in the FDMRS technique, more sophisticated experiments can be performed. For example, we have spectroscopically studied the relaxation of the magnetization. Finally, we have shown that single molecule magnets are efficient Faraday rotators in the terahertz frequency range.
Last modified:22 October 2012 2.30 p.m.