Superconductivity and flux pinning in Nd/sub 1+x/Ba/sub 2-x/Cu/sub 3/O/sub 7+ delta /

Author

Yoo, S.I. ; Kramer, M.J. ; McCallum, R.W.

Author_Institution

Ames Lab., Iowa State Univ., IA, USA

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1232

Lastpage

1235

Abstract

The substitution of Nd/sup +3/ for Ba/sup +2/ in Nd/sub 1+x/Ba/sub 2-x/Cu/sub 3/O/sub 7/ (Nd123ss) increases the occupation of O(5) sites. For x>0.1 there is a significant depression of T/sub c/, and for x<0.1 there is no substantial decrease in T/sub c/ within experimental error. T/sub c/ vs. x is characterized by two plateaus, analogously to T/sub c/ vs. delta in YBa/sub 2/Cu/sub 3/O/sub 7- delta / (Y123). Analysis of oxygen contents of Nd123ss suggests the analogy with Y123 is valid. The transition width and Meissner fraction for all Nd123ss samples are strongly dependent on the sintering temperatures. While T/sub c/ is not affected over the range 0>

Keywords

Meissner effect; barium compounds; flux creep; flux pinning; high-temperature superconductors; magnetic hysteresis; neodymium compounds; sintering; superconducting transition temperature; Meissner fraction; Nd/sub 1+x/Ba/sub 2-x/Cu/sub 3/O/sub 7/; Nd/sup 3+/ substitution; flux creep; flux pinning; high temperature superconductors; hysteresis; sintering temperatures; superconducting order parameter; transition width; Atomic measurements; Energy measurement; Flux pinning; Magnetic flux; Magnetic hysteresis; Neodymium; Superconducting magnets; Superconducting transition temperature; Superconductivity; Temperature dependence;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233402

Filename

233402