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Spins in the vortices of a high-temperature superconductor.

Authors
  • Lake, B
  • Aeppli, G
  • Clausen, K N
  • McMorrow, D F
  • Lefmann, K
  • Hussey, N E
  • Mangkorntong, N
  • Nohara, M
  • Takagi, H
  • Mason, T E
  • Schröder, A
Type
Published Article
Journal
Science (New York, N.Y.)
Publication Date
Mar 02, 2001
Volume
291
Issue
5509
Pages
1759–1762
Identifiers
PMID: 11230686
Source
Medline
License
Unknown

Abstract

Neutron scattering is used to characterize the magnetism of the vortices for the optimally doped high-temperature superconductor La(2-x)Sr(x)CuO4 (x = 0.163) in an applied magnetic field. As temperature is reduced, low-frequency spin fluctuations first disappear with the loss of vortex mobility, but then reappear. We find that the vortex state can be regarded as an inhomogeneous mixture of a superconducting spin fluid and a material containing a nearly ordered antiferromagnet. These experiments show that as for many other properties of cuprate superconductors, the important underlying microscopic forces are magnetic.

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