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High-field3He-F interaction at the surface of fluorocarbon spheres

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High-field experiments on the relaxation between19F in small Teflon spheres and3He on the surface are reported. With3He as a monolayer, coupling times are found to be less than 5 sec, in magnetic fields up to 3 T and temperatures down to 50 mK, where electronic centers are completely polarized. The results between 200 and 300 mK and for three magnetic fields fit a coupling model involving an unusually large exchange interaction in the monolayer. With liquid3He we obtain a linear dependence of the3He relaxation time upon both field and temperature.

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Laboratoire associé au CNRS (LA no. 2).

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Schuhl, A., Rasmussen, F.B. & Chapellier, M. High-field3He-F interaction at the surface of fluorocarbon spheres. J Low Temp Phys 57, 483–499 (1984). https://doi.org/10.1007/BF00683676

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  • Magnetic Field
  • Relaxation Time
  • Magnetic Material
  • Linear Dependence
  • Exchange Interaction