Journal
SCIENCE
Volume 350, Issue 6262, Pages 798-801Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aad2449
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Funding
- Natural Sciences and Engineering Research Council Canada [RGPIN 170827-2010, RGPIN 04239, RGPIN 2014-04796]
- Canada Research Chairs [950206567]
- Alberta Innovates Technology Futures (iCiNano)
- National Institute for Nanotechnology (NINT) [A1-004906]
- Canada Foundation for Innovation [20314]
- Manitoba Research and Innovation Fund
- Canadian Microelectronics Corp.
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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.
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