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

9th International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials

物理学;材料科学

Koblischka-Veneva, A.^1 ; Koblischka, M.R.^1 ; Ide, N.^2 ; Inoue, K.^2 ; Muralidhar, M.^2 ; Hauet, T.^3 ; Murakami, M.^2

Institute of Experimental Physics, Saarland University, Campus C 6 3, Saarbrücken

D-66123, Germany^1

Superconducting Materials Laboratory, Department of Materials Science and Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo

135-8548, Japan^2

Institute Jean Lamour, UMR CNRS-Université de Lorraine, Vandœuvre-lès-Nancy, France^3

关键词: Directional growth;    Electron back scatter diffraction;    Flux pinning force;    High Tc superconductors;    Magnetic analysis;    Single-crystalline materials;    SQUID measurements;    Superconducting foam;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/695/1/012002/pdf
DOI  :  10.1088/1742-6596/695/1/012002

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

YBa2Cu3Oy(YBCO) foam samples show an open, porous foam structure, which may have benefits for many applications of high-Tcsuperconductors. 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.