Resistivity, fluctuation-enhanced conductivity, and irreversibility line of high-quality Tl2Ba2Ca2Cu3O10 single crystals

Authors

  • K. Winzer,

    1. Physikalisches Institut, Bunsenstr. 9, and Institut für Anorganische Chemie, Tammannstr. 4, Universität Göttingen, W-3400 Göttingen, Germany
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  • G. Kumm,

    1. Physikalisches Institut, Bunsenstr. 9, and Institut für Anorganische Chemie, Tammannstr. 4, Universität Göttingen, W-3400 Göttingen, Germany
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  • P. Maaß,

    1. Physikalisches Institut, Bunsenstr. 9, and Institut für Anorganische Chemie, Tammannstr. 4, Universität Göttingen, W-3400 Göttingen, Germany
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  • H. Thomas,

    1. Physikalisches Institut, Bunsenstr. 9, and Institut für Anorganische Chemie, Tammannstr. 4, Universität Göttingen, W-3400 Göttingen, Germany
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  • E. Schwarzmann,

    1. Physikalisches Institut, Bunsenstr. 9, and Institut für Anorganische Chemie, Tammannstr. 4, Universität Göttingen, W-3400 Göttingen, Germany
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  • A. Aghaie,

    1. Physikalisches Institut, Bunsenstr. 9, and Institut für Anorganische Chemie, Tammannstr. 4, Universität Göttingen, W-3400 Göttingen, Germany
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  • F. Ladenberger

    1. Physikalisches Institut, Bunsenstr. 9, and Institut für Anorganische Chemie, Tammannstr. 4, Universität Göttingen, W-3400 Göttingen, Germany
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Abstract

We present measurements of the resistivity tensor components ρa (T) and ρc (T) of high-quality Tl2Ba2Ca2Cu3O10 single crystals wit Tc = 118 … 121 K. The in-plane resistivity ρa as well as the out-of-plane resistivity ρc show a metal-like temperature dependence with an anisotropy ratio ρca of up to 103. The coherence length ξc (0) = 0.15 nm could be determined from an analysis of the fluctuation conductivity above Tc. From measurements of the ac-susceptibility in magnetic fields up to 10 Tesla the temperature dependence of the depinning line could be obtained. The diffusion coefficient of the flux lines obtained from the frequency dependence of the depinning temperature shows a thermally activated behaviour of the flux motion in the field range 0.1 TB ⩽ 10 T.

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