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Fluxoids and neutron polarisation effects
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UNSPECIFIED (1999) Fluxoids and neutron polarisation effects. In: 2nd Workshop on Polarised Neutrons for Condensed Matter Investigations (PNCMI'98), INST LAUE LANGEVIN, CHADWICK AMPHITHEATER, GRENOBLE, FRANCE, SEP 21-23, 1998. Published in: PHYSICA B-CONDENSED MATTER, 267 pp. 115-121. ISSN 0921-4526.
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Abstract
There are several ways of investigating flux lines with polarised neutrons. We shall describe our recent work on IN 15 at ILL, investigating spatially varying fields perpendicular to the fluxoid axes, which are present with tilted fields in anisotropic superconductors. These field components may be detected by polarisation analysis of neutrons diffracted by the flux line lattice, and allow a detailed investigation of flux structure in such materials as YBCO and NbSe2. A further application of polarised neutrons is the use of neutron spin-echo techniques to measure the speed of moving flux lines. We have recently demonstrated this in an Nb-Ta alloy on instruments IN11 and IN15, by measuring the energy change of neutrons diffracted by flux lines, which are moving under the influence of a transport current. We shall also comment on others' work on the search for interference terms between flux lattice and nuclear diffraction signals, and the use of neutron depolarisation for investigation of flux distributions in superconductors. (C) 1999 Elsevier Science B.V. All rights reserved.
Item Type: | Conference Item (UNSPECIFIED) | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | PHYSICA B-CONDENSED MATTER | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0921-4526 | ||||
Official Date: | June 1999 | ||||
Dates: |
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Volume: | 267 | ||||
Number of Pages: | 7 | ||||
Page Range: | pp. 115-121 | ||||
Publication Status: | Published | ||||
Title of Event: | 2nd Workshop on Polarised Neutrons for Condensed Matter Investigations (PNCMI'98) | ||||
Location of Event: | INST LAUE LANGEVIN, CHADWICK AMPHITHEATER, GRENOBLE, FRANCE | ||||
Date(s) of Event: | SEP 21-23, 1998 |
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