https://doi.org/10.1007/s100510070160
Mechanical detection of nuclear spin relaxation in a micron-size crystal
1
Laboratoire des Solides Irradiés,
École Polytechnique, 91128 Palaiseau, France
2
Physics Department,
Kazan State University, Kazan, 420008, Russia
Received:
23
February
2000
Published online: 15 September 2000
A room temperature nuclear magnetic resonance force
microscope (MRFM), fitted in a 1 tesla electromagnet, has been used
to measure the nuclear spin relaxation of 
H in a
micron-size (70 ng) crystal of ammonium sulfate. NMR sequences,
combining both pulsed and continuous wave radio-frequency fields, have allowed
us to measure mechanically T2 and T1, the transverse and
longitudinal spin relaxation times. Because two spin species with
different T1 values are measured in our 7 μm thick crystal,
magnetic resonance imaging of their spatial distribution inside the
sample section have been performed. To understand quantitatively the
measured signal, we carefully study the influence of spin-lattice
relaxation and non-adiabaticity of the continuous-wave sequence on the
intensity and time dependence of the detected signal.
PACS: 07.79.Pk – Magnetic force microscopes / 76.60.-k – Nuclear magnetic resonance and relaxation / 87.61.Ff – Instrumentation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
