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The MagLab is funded by the National Science Foundation and the State of Florida.

Frequency Domain Magnetic Resonance (FDMR)

FDMR is a version of Electron Magnetic Resonance (EMR) that depends on sweeping the frequency instead of magnetic field, as is the standard in EMR.

FDMR is a version of Electron Magnetic Resonance (EMR) that depends on sweeping the frequency instead of magnetic field, as is the standard in EMR. As such, it is of particular value in determining the zero-field splitting (zfs) of paramagnetic transition metal ions and their clusters. On a more general level, FDMR is applicable to any chemical/physical electron spin system with zero-field energy gap(s) such as high-spin paramagnets, ferro- or anti-ferromagnets as long as the gaps appear in the frequency/energy range of the FDMR spectrometer based on BWOs (backward wave oscillators, currently 70 GHz – 1.2 THz or 2.3 – 40 cm–1).

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Related Publications

Krzystek, J., et al, High-frequency and -field EPR study of the Fe(H2O)62+ ion in ferrous fluorosilicate, J. Magn. Reson., 213 (2011) Read online.


Aromí, G., et al, A novel Ni4 complex exhibiting microsecond quantum tunneling of the magnetization, Chem. Eur. J., 14 (2008) Read online.


Telser, J., et al, High-frequency / high-field EPR spectroscopy of the high-spin ferrous ion in hexaaqua complexes, J. Magn. Reson. Chem., 43, S130-139. (2005) Read online.


van Slageren, J., et al, Frequency-domain magnetic resonance spectroscopy of molecular magnetic materials, Phys. Chem. Chem. Phys., 5 (2003) Read online.


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Last modified on 27 December 2022

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