Research output: Contribution to Journal/Magazine › Journal article › peer-review
Spatial manipulation of the persistent precessing spin domain in superfluid He-3-B. / Bradley, D. Ian; Clubb, D. O.; Fisher, Shaun N. et al.
In: Journal of Low Temperature Physics, Vol. 134, No. 1-2, 01.2004, p. 351-356.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Spatial manipulation of the persistent precessing spin domain in superfluid He-3-B.
AU - Bradley, D. Ian
AU - Clubb, D. O.
AU - Fisher, Shaun N.
AU - Guénault, A.M.
AU - Matthews, C. J.
AU - Pickett, George R.
AU - Skyba, P.
PY - 2004/1
Y1 - 2004/1
N2 - Using pulsed NMR we have been studying the properties of the persistent precessing domain (PPD) in superfluid He-3-B at ultralow temperatures. These precessing spin domains are very long-lived, persisting for periods of over half an hour under favourable conditions. In the current experiment, by using two NMR coils, we are able to monitor the spatial location of the domain. The PPD is trapped in a field minimum along the axis of the cell, the position of which we can manipulate by variation of the field gradient. We find that the signal lifetime becomes much shorter and independent of temperature when the region of precession is brought into close proximity to the closed end of the experimental cell, suggesting that an extra temperature-independent dissipation mechanism comes into play in the vicinity of the cell walls.
AB - Using pulsed NMR we have been studying the properties of the persistent precessing domain (PPD) in superfluid He-3-B at ultralow temperatures. These precessing spin domains are very long-lived, persisting for periods of over half an hour under favourable conditions. In the current experiment, by using two NMR coils, we are able to monitor the spatial location of the domain. The PPD is trapped in a field minimum along the axis of the cell, the position of which we can manipulate by variation of the field gradient. We find that the signal lifetime becomes much shorter and independent of temperature when the region of precession is brought into close proximity to the closed end of the experimental cell, suggesting that an extra temperature-independent dissipation mechanism comes into play in the vicinity of the cell walls.
KW - superfluid
KW - helium-3
KW - SPIN PRECESSION
U2 - 10.1023/B:JOLT.0000012578.20806.7e
DO - 10.1023/B:JOLT.0000012578.20806.7e
M3 - Journal article
VL - 134
SP - 351
EP - 356
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 1-2
ER -