Torque-mixing magnetic resonance spectroscopy

A universal, torque-mixing method for magnetic resonance spectroscopy is presented. In analogy to resonance detection by magnetic induction, the transverse component of a precessing dipole moment can be measured in sensitive broadband spectroscopy, here using a resonant mechanical torque sensor. Unl...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2015-11, Vol.350 (6262), p.798-801
Main Authors: Losby, J. E., Sani, F. Fani, Grandmont, D. T., Diao, Z., Belov, M., Burgess, J. A. J., Compton, S. R., Hiebert, W. K., Vick, D., Mohammad, K., Salimi, E., Bridges, G. E., Thomson, D. J., Freeman, M. R.
Format: Article
Language:English
Subjects:
Devices
Logical Thinking
Magnetic fields
Magnetic induction
Magnetic resonance
NMR
Nuclear magnetic resonance
Single crystals
Spectroscopy
Surface layer
Texture
Torque
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Summary:A universal, torque-mixing method for magnetic resonance spectroscopy is presented. In analogy to resonance detection by magnetic induction, the transverse component of a precessing dipole moment can be measured in sensitive broadband spectroscopy, here using a resonant mechanical torque sensor. Unlike induction, the torque amplitude allows equilibrium magnetic properties to be monitored simultaneously with the spin dynamics. Comprehensive electron spin resonance spectra of a single-crystal, mesoscopic yttrium iron garnet disk at room temperature reveal assisted switching between magnetization states and mode-dependent spin resonance interactions with nanoscale surface imperfections. The rich detail allows analysis of even complex three-dimensional spin textures. The flexibility of microelectromechanical and optomechanical devices combined with broad generality and capabilities of torque-mixing magnetic resonance spectroscopy offers great opportunities for development of integrated devices.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.aad2449