Title :
Characterization and critical currents of the Superconducting ferromagnet RuSr2GdCu2O8
Author :
Cobas, R. ; Pérez, S. Muñoz, Jr. ; Aguiar, J. Albino
Author_Institution :
Centro de Ciencias Exatas e da Natureza, Univ. Fed. de Pernambuco, Recife, Brazil
fDate :
6/1/2005 12:00:00 AM
Abstract :
Superconducting ferromagnet Ru1-xSr2Gd Cu2+xO8 with x=0, 0.2 and 0.4 has been synthesized and characterized structurally, microstructurally and electrically by x-ray diffraction, scanning electron microscopy and resistivity measurements. Arrhenius plots of ln(ρ/ρo) vs T and potential energy are being reported. Two-different regimens of pinning are found. We show that U0 data can be interpreted in terms of a possible structural change in the grain boundaries.
Keywords :
X-ray diffraction; critical current density (superconductivity); ferromagnetic materials; flux pinning; gadolinium compounds; grain boundaries; high-temperature superconductors; ruthenium compounds; scanning electron microscopy; strontium compounds; superconducting magnets; Arrhenius plots; RuSr2GdCu2O8; X-ray diffraction; critical currents; flux pinning; grain boundaries; resistivity measurements; scanning electron microscopy; superconducting ferromagnet; Antiferromagnetic materials; Conductivity measurement; Magnetic flux; Magnetic materials; Potential energy; Powders; Scanning electron microscopy; Superconducting magnets; Temperature; X-ray diffraction; Arrhenius; superconducting ferromagnet;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.848763
