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Dimensionality crossover in Tl2Ba2Ca2Cu3O10−δ compounds in magnetic fields

✍ Scribed by W.J. Yeh; L.K. Yu; Z.Q. Yu; Y. Xin; W.K. Wong

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 148 KB
Volume: 194-196
Category: Article
ISSN: 0921-4526
DOI: 10.1016/0921-4526(94)91242-4

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✦ Synopsis

The I-V characteristics of T12Ba.zCaeCu3Oi0q bulk samples have been measured in magnetic fields (0.07-1.2 T). It is found that at low fields (0.07-0.15 T), The nonlinear I-V curves show scaling behaviors which are consistent with a three dimensional Vortex-Glass phase transition with a dynamic exponent z=2.7. As the magnetic field increases, I-V curves gradually deviate from the typical Vortex-Glass sealing behavior. When H>0.6 T, a pure power-law in the I-V curves could not be found at any temperature, which indicates that a 3D to 2D crossover occurs.

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