TechConnect World Innovation Conference and Expo June 14-17, 2015, Washington, DC
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TechConnect World 2015
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Useful magnetic resonance force microscopy for cryogenic experiments

S. Won, J. Heo, Y. Rhyim
Korea Institute of Materials Science, KR

Keywords: MRFM, magnetic resonance, force detection, materials characterization, scanning probe

Summary:

Conventional magnetic resonance imaging (MRI) has been persistently used due to its prominent spatial resolution and nondestructive method. Nevertheless, this inductive method using pick-up coils cannot resolve objects smaller than several microns. Several studies reported in recent years have demonstrated the potential of magnetic resonance force microscopy (MRFM) in the fields of nuclear magnetic resonance (NMR) and MRI. As an example, NMR spectroscopy for a general thin film was reported for a 34-nm-thick thin film. MRFM has been proposed as a new technique that could improve the sensitivity and spatial resolution of magnetic resonance to the single spin level. This is based on the detection of the magnetic force between a ferromagnetic magnet and spins in a sample. This paper presents a cryogen-free cooling MRFM system. Our system was specifically designed to provide an ultra-low vibration measurement platform for cryogenic MRFM experiments. Our results are demonstrated from electron spin resonance (ESR) experiment of a paramagnetic sample.

 

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