Torque-mixing magnetic resonance spectroscopy

New method for measuring magnetic resonance reported in Science

Using the Zurich Instruments UHFLI with the UHF-MF and UHF-MOD options, a new method of measuring magnetic resonance by torque magnetometry has been developed by the research group of Professor Mark Freeman at the University of Alberta and National Institute for Nanotechnology. 

The method reported consists of a nanoscale torque sensor housing a mesoscopic single-crystal garnet disk which, under an applied oscillating magnetic field, experiences a mechanical twist that is detected optomechanically.  Unlike induction (which is used in most magnetic resonance spectroscopy techniques), the method can probe equilibrium magnetic properties and the spin dynamics simultaneously.

Postdoctoral fellow Joseph Losby and PhD candidate Fatemeh Fani Sani (recipient of the 2015 Zurich Instruments Student Travel Grant) led the research under the guidance of Professor Freeman, along with collaborators at the National Institute for Nanotechnology and the University of Manitoba. The results, "Torque-mixing Magnetic Resonance Spectroscopy", were recently published in the journal Science.

There is more background about the technique and its applications here.

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