MAGNETIC RELAXATION BEHAVIOUR OF YBCO6.9 (123) AND BSCCO8 (2212) CRYSTALSстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We have studied the form of the irreversible magnetic relaxation in high quality YBCO (123) and BSCCO (2212) crystals with the magnetic field applied parallel to the crystal c axis. In YBCO crystals, three different regimes of vortex dynamics can be discerned over a wide region of the H-T plane; with application of a scaling field, the data taken at different temperatures collapse onto a single curve. In BSCCO the absolute value of the relaxation is higher than in YBCO, reflecting the weaker pinning in this more two dimensional system and only one of the three regimes of relaxation behaviour seen in YBCO, is observed.