التفاصيل البيبلوغرافية
| العنوان: |
Feasibility of imaging in nuclear magnetic resonance force microscopy using Boltzmann polarization. |
| المؤلفون: |
de Wit, M., Welker, G., Wagenaar, J. J. T., Hoekstra, F. G., Oosterkamp, T. H. |
| المصدر: |
Journal of Applied Physics; 2019, Vol. 125 Issue 8, pN.PAG-N.PAG, 10p, 1 Color Photograph, 2 Charts, 7 Graphs |
| مصطلحات موضوعية: |
MAGNETIC resonance force microscopy, NUCLEAR spin, BLOCH equations, MAGNETIC fields, PROTONS, MAGNETIC resonance imaging |
| مستخلص: |
We report on magnetic resonance force microscopy measurements of the Boltzmann polarization of nuclear spins in copper by detecting the frequency shift of a soft cantilever. We use the time-dependent solution of the Bloch equations to derive a concise equation describing the effect of radio-frequent (RF) magnetic fields on both on- and off-resonant spins in high magnetic field gradients. We then apply this theory to saturation experiments performed on a 100 nm thick layer of copper, where we use the higher modes of the cantilever as a source of the RF field. We demonstrate a detection volume sensitivity of only (40 nm) 3 , corresponding to about 1.6 × 10 4 polarized copper nuclear spins. We propose an experiment on protons where, with the appropriate technical improvements, frequency-shift based magnetic resonance imaging with a resolution better than (10 nm) 3 could be possible. Achieving this resolution would make imaging based on the Boltzmann polarization competitive with the more traditional stochastic spin-fluctuation based imaging, with the possibility to work at millikelvin temperatures. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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