Abstract
The applied field dependences of a remnant magnetic flux trapped by YBa 2 Cu 3 O 6.9 superconducting ceramics and its behaviour versus time have been derived from measurements of the neutron spin Larmor precession frequency within a sample. The time dependent decay of the trapped flux was observed to be nonlogarithmic for low applied fields 0 H T = 78 K. The decay rate increases with the magnitude of the trapped magnetic field.
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