Vortex bending in a tilted YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} crystal

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.R5774· OSTI ID:542266

Obaidat, I M; Park, S J; Safar, H; Kouvel, J S ^[1]

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1. Department of Physics, University of Illinois, Chicago, Illinois 60607-7059 (United States)

Magnetization-vector measurements were made on a YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} crystal, initially cooled to 4.2 K in an external field {bold H}{sub e} parallel to the c axis. With {bold H}{sub e} fixed, the crystal was then tilted, such that the angle {theta} between the c axis and {bold H}{sub e} was gradually raised to 90{degree} and lowered back to zero. Our results reveal that all the vortex flux remains parallel to the c axis until the tilt angle {theta} reaches a threshold value (close to 15{degree} for H{sub e}{le}500Oe). As {theta} exceeds this value, the vortex flux in the ab plane rises rapidly from zero, and it appears to derive solely from a bending of the vortices initially directed along c. This whole process is fairly consistent with theoretical predictions, and it is found to be essentially reversible with the cycling of {theta} at low H{sub e}. The hysteresis that develops at higher H{sub e} rises and approaches the conventional hysteresis measured along ab after zero-field cooling. Comparison is also made with a cross-flux experiment, which is seen to be only superficially equivalent to the crystal-tilt experiment. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 542266
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 10 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MAGNETIZATION
VORTICES
YTTRIUM OXIDES