Microstructural and magnetic analysis of a superconducting foam and comparison with IG-processed bulk samples

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Abstract

YBa2Cu3Oy (YBCO) foam samples show an open, porous foam structure, which may have benefits for many applications of high-T c superconductors. As the basic material of these foams is a pseudo-single crystalline material with the directional growth initiated by a seed crystal similar to standard melt-textured samples, the achieved texture of the YBCO is a very important parameter. We analyzed the local texture and grain orientation of the individual struts forming the foam by means of atomic force microscopy and electron backscatter diffraction (EBSD). Furthermore, the magnetic properties of a foam strut are evaluated by means of SQUID measurements, from which the flux pinning forces were determined. A scaling of the pinning forces in the temperature range between 60 K and 85 K was performed. These data and the details of the microstructure are compared to IG-processed, bulk material.

Original languageEnglish
Article number012002
JournalJournal of Physics: Conference Series
Volume695
Issue number1
DOIs
Publication statusPublished - 2016 Mar 17

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foams
struts
textures
flux pinning
seeds
atomic force microscopy
magnetic properties
scaling
microstructure
diffraction
crystals
electrons
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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title = "Microstructural and magnetic analysis of a superconducting foam and comparison with IG-processed bulk samples",
abstract = "YBa2Cu3Oy (YBCO) foam samples show an open, porous foam structure, which may have benefits for many applications of high-T c superconductors. As the basic material of these foams is a pseudo-single crystalline material with the directional growth initiated by a seed crystal similar to standard melt-textured samples, the achieved texture of the YBCO is a very important parameter. We analyzed the local texture and grain orientation of the individual struts forming the foam by means of atomic force microscopy and electron backscatter diffraction (EBSD). Furthermore, the magnetic properties of a foam strut are evaluated by means of SQUID measurements, from which the flux pinning forces were determined. A scaling of the pinning forces in the temperature range between 60 K and 85 K was performed. These data and the details of the microstructure are compared to IG-processed, bulk material.",
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AU - Koblischka-Veneva, Anjela Dimitrova

AU - Koblischka, Michael Rudolf

AU - Ide, N.

AU - Inoue, Kazuo

AU - Miryala, Muralidhar

AU - Hauet, T.

AU - Murakami, Masato

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