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Field Induced Vanishing of the Vortex Glass Temperature in Tl 2 Ba 2 CaCu 2 O 8 Thin Films
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wen, Harold H. Hoekstra, A. F. Th. Griessen, Ronald Fang, Li |
| Copyright Year | 1997 |
| Abstract | The current densityjs and relaxation rateQ have been measured on a ring shaped Tl 2Ba2CaCu2O8 film between 4.2 K and the irreversibility temperature in magnetic fields up to 7 T. The temperature and field dependent exponent msT , Bed used to parametrize the activation energy U in the form Us js , T , Bed sUcymd fs jcyjsd 2 1g is determined for many different fields. In the Be-T phase diagram we associate the m 0 line with the glass temperature Tg and find thatTg essentially drops to 0 K atBe ø 0.7 T, which indicates a dimensional crossover at this field. The m . 0 region sBe , 0.7 T, T # 55 Kd corresponds to 3D elastic vortex motin while the m , 0 region corresponds to 2D dislocation mediated flux creep. [S0031-9007(97)03832-5] |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://research.vu.nl/ws/portalfiles/portal/1792937/L101.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |