Pulling rate and current intensity competition in an electrically assisted laser floating zone

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abstract

Bi-Sr-Ca-Cu-O (BSCCO) superconducting fibres were grown using the laser floating zone technique assisted by a dc electrical current (electrically assisted laser floating zone-EALFZ process). The simultaneous effect of pulling rate and applied current intensity was evaluated on the premises of the: (i) elemental partition coefficient between solid and molten zone; (ii) phase development; (iii) crystal size and alignment degree of the primary and superconducting phases; (iv) phase transformation during heat treatment and (v) superconducting properties. The highest critical current density value (J(C) = 2240 A cm(-2)) was obtained for the fibres pulled at intermediate pulling rates (75 mm h (1)) grown under a maximum dc electric current intensity (200 mA).

keywords

O SUPERCONDUCTING FIBERS; EPITAXIAL-GROWTH; FIELD; TEMPERATURE; INTERFACE; BI-2223

subject category

Physics

authors

Carrasco, MF; Silva, RF; Vieira, JM; Costa, FM

our authors

foto Joaquim Manuel Vieira

Joaquim Manuel Vieira

Retired Professor
foto Rui Ramos Ferreira e Silva

Rui Ramos Ferreira e Silva

Associate Professor

Groups

G2 - Photonic, Electronic and Magnetic Materials
G3 - Electrochemical Materials, Interfaces and Coatings

acknowledgements

The authors gratefully acknowledge the FCT for financial support (Project PTDC/CTM/66195/2006).

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Publication Details

type
Journal Article
year
2009
journal
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
volume
22
article number
065016
publisher
IOP PUBLISHING LTD
issn
0953-2048
issue
6
digital object identifier
10.1088/0953-2048/22/6/065016
web of science article identifier
WOS:000266219400030

Journal Metrics (JCR 2019)

Journal Impact Factor
3.067
Journal Impact Factor (5 yrs)
2.933
category normalized journal percentile
64.65

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