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Title: Small-angle neutron scattering study of the flux-line lattice in a single crystal of Bi[sub 2. 15]Sr[sub 1. 95]CaCu[sub 2]O[sub 8+[ital x]] (invited)

Abstract

A flux-line lattice (FLL) was observed in a single crystal of Bi[sub 2.15]Sr[sub 1.95]CaCu[sub 2]O[sub 8+[ital x]] (BSCCO) using small-angle neutron scattering methods. The sample has a superconducting transition at 85 K. The flux-line lattice is observed to melt, evidenced by the rapid disappearance of diffracted intensity as the temperature is increased above a field-dependent melting temperature. Diffracted intensity due to the vortex lattice also falls off as the applied field is increased. It is believed that this is a manifestation of the transition of the three-dimensional flux lines into two-dimensional pancake vortices. The Bragg intensity of the FLL peak is inversely proportional to the fourth power of the London penetration depth ([lambda][sub [ital L]]). Hence, the temperature ([ital T]) dependence of the order parameter can be measured quite accurately from the intensity of the Bragg spots at different temperatures. In BSCCO with an applied field of 50 mT, the measured [ital T] dependence appears linear. The low-[ital T] behavior is of great interest for an understanding of the underlying mechanism for superconductivity in these materials.

Authors:
;  [1]; ; ;  [2];  [3];  [4];  [5];  [6];  [7]
  1. Oak Ridge National Laboratory, Solid State Division, MS 6393, Oak Ridge, Tennessee 37831-6393 (United States)
  2. School of Physics and Space Research, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)
  3. Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)
  4. Physk-Institut der Universitaet Zuerich, CH-8057 Zuerich (Switzerland)
  5. Superconductivity Research Laboratory, ISTEC (Japan)
  6. Kammerlingh Onnes Laboratorium, Leiden University, P.O. Box 9506, 2300 RA, Leiden (Netherlands)
  7. Physics Department, Riso National Laboratory, DK-4000, Roskilde (Denmark)
Publication Date:
OSTI Identifier:
6909599
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics; (United States)
Additional Journal Information:
Journal Volume: 76:10; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH OXIDES; MAGNETIC FLUX; CALCIUM OXIDES; COPPER OXIDES; STRONTIUM OXIDES; HIGH-TC SUPERCONDUCTORS; MONOCRYSTALS; NEUTRON BEAMS; SMALL ANGLE SCATTERING; TEMPERATURE DEPENDENCE; ALKALINE EARTH METAL COMPOUNDS; BEAMS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; NUCLEON BEAMS; OXIDES; OXYGEN COMPOUNDS; PARTICLE BEAMS; SCATTERING; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; 360207* - Ceramics, Cermets, & Refractories- Superconducting Properties- (1992-)

Citation Formats

Yethiraj, M, Mook, H A, Forgan, E M, Cubitt, R, Wylie, M T, Paul, D M, Lee, S L, Ricketts, J, Kes, P H, and Mortensen, K. Small-angle neutron scattering study of the flux-line lattice in a single crystal of Bi[sub 2. 15]Sr[sub 1. 95]CaCu[sub 2]O[sub 8+[ital x]] (invited). United States: N. p., 1994. Web. doi:10.1063/1.358128.
Yethiraj, M, Mook, H A, Forgan, E M, Cubitt, R, Wylie, M T, Paul, D M, Lee, S L, Ricketts, J, Kes, P H, & Mortensen, K. Small-angle neutron scattering study of the flux-line lattice in a single crystal of Bi[sub 2. 15]Sr[sub 1. 95]CaCu[sub 2]O[sub 8+[ital x]] (invited). United States. https://doi.org/10.1063/1.358128
Yethiraj, M, Mook, H A, Forgan, E M, Cubitt, R, Wylie, M T, Paul, D M, Lee, S L, Ricketts, J, Kes, P H, and Mortensen, K. Tue . "Small-angle neutron scattering study of the flux-line lattice in a single crystal of Bi[sub 2. 15]Sr[sub 1. 95]CaCu[sub 2]O[sub 8+[ital x]] (invited)". United States. https://doi.org/10.1063/1.358128.
@article{osti_6909599,
title = {Small-angle neutron scattering study of the flux-line lattice in a single crystal of Bi[sub 2. 15]Sr[sub 1. 95]CaCu[sub 2]O[sub 8+[ital x]] (invited)},
author = {Yethiraj, M and Mook, H A and Forgan, E M and Cubitt, R and Wylie, M T and Paul, D M and Lee, S L and Ricketts, J and Kes, P H and Mortensen, K},
abstractNote = {A flux-line lattice (FLL) was observed in a single crystal of Bi[sub 2.15]Sr[sub 1.95]CaCu[sub 2]O[sub 8+[ital x]] (BSCCO) using small-angle neutron scattering methods. The sample has a superconducting transition at 85 K. The flux-line lattice is observed to melt, evidenced by the rapid disappearance of diffracted intensity as the temperature is increased above a field-dependent melting temperature. Diffracted intensity due to the vortex lattice also falls off as the applied field is increased. It is believed that this is a manifestation of the transition of the three-dimensional flux lines into two-dimensional pancake vortices. The Bragg intensity of the FLL peak is inversely proportional to the fourth power of the London penetration depth ([lambda][sub [ital L]]). Hence, the temperature ([ital T]) dependence of the order parameter can be measured quite accurately from the intensity of the Bragg spots at different temperatures. In BSCCO with an applied field of 50 mT, the measured [ital T] dependence appears linear. The low-[ital T] behavior is of great interest for an understanding of the underlying mechanism for superconductivity in these materials.},
doi = {10.1063/1.358128},
url = {https://www.osti.gov/biblio/6909599}, journal = {Journal of Applied Physics; (United States)},
issn = {0021-8979},
number = ,
volume = 76:10,
place = {United States},
year = {1994},
month = {11}
}