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Issue 13, 2003
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High-frequency magnetic spectroscopy on the molecular magnetic cluster V15

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Abstract

A novel type of high-frequency magnetic resonance spectroscopy was used to investigate magnetic excitations of the molecular magnetic cluster V15 in the frequency range from 1.5 cm−1 to 10 cm−1, at low temperatures, between 2.5 K and 30 K. In the optical transmission spectra, we observed absorption lines over a wide range of magnetic fields up to 6.5 T, which correspond to the Zeeman splitting of the low-lying spin states. Our frequency-domain technique, and advanced data analysis allow accurate determination of the principal values of the anisotropic g tensor, and other mode parameters, even for powder samples. The g values were obtained as g∥c = 1.981 ± 0.003 and gc = 1.953 ± 0.003, while the intrinsic linewidth was found to be Δν = 0.02–0.035 cm−1 (210–370 Oe). The temperature dependence of Δμ, the mode contribution to the magnetic permeability, is in good agreement with theory.

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Article information


Submitted
26 Feb 2003
Accepted
12 May 2003
First published
28 May 2003

Phys. Chem. Chem. Phys., 2003,5, 2778-2782
Article type
Paper

High-frequency magnetic spectroscopy on the molecular magnetic cluster V15

S. Vongtragool, B. Gorshunov, A. A. Mukhin, J. van Slageren, M. Dressel and A. Müller, Phys. Chem. Chem. Phys., 2003, 5, 2778
DOI: 10.1039/B302244G

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