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Mechanical detection of nuclear spin relaxation in a micron-size crystal

O. Klein·V. V. Naletov·H. Alloul
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Abstract

A room temperature nuclear magnetic resonance force microscope (MRFM), fitted in a $^1$Tesla electromagnet, is used to measure the nuclear spin relaxation of $^1$H in a micron-size (70ng) crystal of ammonium sulfate. NMR sequences, combining both pulsed and continuous wave r.f. fields, have allowed us to measure mechanically $T_2$ and $T_1$, the transverse and longitudinal spin relaxation times. Because two spin species with different $T_1$ values are measured in our $7μ{\rm m}$ thick crystal, magnetic resonance imaging of their spatial distribution inside the sample section are performed. To understand quantitatively the measured signal, we carefully study the influence of the spin-lattice relaxation and the non-adiabaticity of the c.w. sequence on the intensity and time dependence of the detected signal.

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O. Klein, V. V. Naletov, H. Alloul. 2000-02-25. Mechanical detection of nuclear spin relaxation in a micron-size crystal. https://doi.org/10.1007/s100510070160

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