Mapping of magnetic force and field distribution of melt-textured Y-Ba-Cu-O

Author

Lehndorff, B. ; Kurschner, H.-G. ; Piel, H.

Author_Institution

Inst. for Materialwissenschaften, Bergische Univ., Wuppertal, Germany

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

1814

Lastpage

1817

Abstract

Melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-x/-bulk material has been prepared by a modified LPP-process. The samples have been characterized by optical microscopy, electron microscopy (SEM) and energy dispersive X-ray diffraction (EDX). An inductive method was used to determine critical current density J/sub c/ and transition temperature T/sub c/. The vertical levitation force and stiffness has been measured over the whole sample area using a permanent magnet and force sensors moved by a 3-dimensional positioning system. The measurements were performed in the field-cooled and zero-field-cooled state. In addition the magnetic field distribution of the flux frozen in by the superconductor was mapped with a Hall probe.<>

Keywords

X-ray chemical analysis; barium compounds; critical current density (superconductivity); flux pinning; high-temperature superconductors; magnetic levitation; optical microscopy; scanning electron microscopy; superconducting transition temperature; yttrium compounds; 3-dimensional positioning system; Hall probe; SEM; YBa/sub 2/Cu/sub 3/O/sub 7-x/; YBa/sub 2/Cu/sub 3/O/sub 7/; critical current density; energy dispersive X-ray diffraction; field-cooled state; force sensors; frozen flux; magnetic field distribution; melt-textured; modified LPP-process; optical microscopy; permanent magnet sensors; stiffness; transition temperature; vertical levitation force; zero-field-cooled state; Electron microscopy; Force measurement; Force sensors; Magnetic field measurement; Magnetic forces; Magnetic materials; Optical microscopy; Scanning electron microscopy; Superconducting transition temperature; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402932

Filename

402932