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  Flux Creep in the Quasi-1D Superconducting Carbide Sc3CoC4

Baenitz, M., Scheidt, E.-W., Lüders, K., & Scherer, W. (2012). Flux Creep in the Quasi-1D Superconducting Carbide Sc3CoC4. Physics Procedia, 36, 698-703. doi:10.1016/j.phpro.2012.06.270.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-20C9-B Version Permalink: http://hdl.handle.net/21.11116/0000-0000-F720-5
Genre: Journal Article

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 Creators:
Baenitz, M.1, Author              
Scheidt, E.-W., Author
Lüders, K.2, Author              
Scherer, W., Author
Affiliations:
1Michael Baenitz, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863471              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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Free keywords: Low dimensional superconductivity; Flux creep relaxation; Collective pinning
 Abstract: The superconducting flux dynamic of the transition metal carbide Sc3CoC4 which exhibits a quasi-one-dimensional structure is studied. Besides zero-field-cooling (zfc), field-cooling (fc) and magnetization measurements, especially flux creep relaxation experiments are performed. The relaxation rates S = dM/dlnt are determined at selected temperatures below the transition temperature Tc in two magnetic fields of 50 Oe and 100 Oe just above Hc1. The resulting supercurrent dependence on the mean activation energy is analyzed according to the collective pinning theory which predicts U ∼ ((j/jc)-μ –1). The calculated μ-values differ in the high and low temperature region. The μ-values below about 2.5 K are ≈ 0.5 - 0.68 depending slightly on the applied magnetic field whereas at higher temperatures the μ-values are ≈ 0.22 - 0.34. These results might indicate a transition between different types of vortex pinning around 2.5 K changing from single vortex creep at higher temperatures to collective creep of vortex bundles at lower temperatures.

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Language(s): eng - English
 Dates: 2012-06-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 618304
DOI: 10.1016/j.phpro.2012.06.270
 Degree: -

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Title: Physics Procedia
Source Genre: Journal
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Pages: - Volume / Issue: 36 Sequence Number: - Start / End Page: 698 - 703 Identifier: ISSN: 1875-3892