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Open AccessArticle

Torque-Detected Electron Spin Resonance as a Tool to Investigate Magnetic Anisotropy in Molecular Nanomagnets

Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
Department of Chemical and Geological Sciences & INSTM Research Unit, University of Modena and Reggio Emilia, via G. Campi 103, I-41125 Modena, Italy
Fakultät für Chemie, Universität Bielefeld, 33501 Bielefeld, Germany
Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
Author to whom correspondence should be addressed.
Present address: Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, UK
Academic Editors: Marius Andruh and Liviu F. Chibotaru
Magnetochemistry 2016, 2(2), 25;
Received: 4 March 2016 / Revised: 22 April 2016 / Accepted: 26 April 2016 / Published: 6 May 2016
(This article belongs to the Special Issue Magnetic Anisotropy)
The method of choice for in-depth investigation of the magnetic anisotropy in molecular nanomagnets is high-frequency electron spin resonance (HFESR) spectroscopy. It has the benefits of high resolution and facile access to large energy splittings. However, the sensitivity is limited to about 107 spins for a reasonable data acquisition time. In contrast, methods based on the measurement of the deflection of a cantilever were shown to enable single spin magnetic resonance sensitivity. In the area of molecular nanomagnets, the technique of torque detected electron spin resonance (TDESR) has been used sporadically. Here, we explore the applicability of that technique by investigating molecular nanomagnets with different types of magnetic anisotropy. We also assess different methods for the detection of the magnetic torque. We find that all types of samples are amenable to these studies, but that sensitivities do not yet rival those of HFESR. View Full-Text
Keywords: magnetic resonance; molecular nanomagnet; magnetic anisotropy magnetic resonance; molecular nanomagnet; magnetic anisotropy
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MDPI and ACS Style

Dörfel, M.; Kern, M.; Bamberger, H.; Neugebauer, P.; Bader, K.; Marx, R.; Cornia, A.; Mitra, T.; Müller, A.; Dressel, M.; Bogani, L.; Van Slageren, J. Torque-Detected Electron Spin Resonance as a Tool to Investigate Magnetic Anisotropy in Molecular Nanomagnets. Magnetochemistry 2016, 2, 25.

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