Effect of a magnetic field on the spin- and charge-density-wave order in La1.45Nd0.4Sr0.15CuO4

S. Wakimoto, R. J. Birgeneau, Y. Fujimaki, N. Ichikawa, T. Kasuga, Y. J. Kim, K. M. Kojima, S.-H. Lee, H. Niko, J. M. Tranquada, S. Uchida, and M. v. Zimmermann
Phys. Rev. B 67, 184419 – Published 30 May 2003
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Abstract

The spin-density wave (SDW) and charge-density wave (CDW) order in superconducting La1.45Nd0.4Sr0.15CuO4 were studied under an applied magnetic field, using neutron and x-ray diffraction techniques. In zero field, incommensurate (IC) SDW order appears below 40K, which is characterized by neutron diffraction peaks at (1/2±0.134,1/2±0.134,0). The intensity of these IC peaks increases rapidly below TNd8K due to an ordering of the Nd3+ spins. The application of a 1 T magnetic field parallel to the c axis markedly diminishes the intensity below TNd, while only a slight decrease in intensity is observed at higher temperatures for fields up to 7 T. Our interpretation is that the c-axis field suppresses the parasitic Nd3+ spin order at the incommensurate wave vector without disturbing the stripe order of Cu2+ spins. Consistent with this picture, the CDW order, which appears below 60 K, shows no change for magnetic fields up to 4 T. These results stand in contrast to the significant field-induced enhancement of the SDW order observed in superconducting La2xSrxCuO4 with x0.12 and stage-4 La2CuO4+y. The differences can be understood in terms of the relative volume fraction exhibiting stripe order in zero field, and the collective results are consistent with the idea that suppression of superconductivity by vortices nucleates local patches of stripe order.

  • Received 19 September 2002

DOI:https://doi.org/10.1103/PhysRevB.67.184419

©2003 American Physical Society

Authors & Affiliations

S. Wakimoto1,*, R. J. Birgeneau1, Y. Fujimaki2, N. Ichikawa2,†, T. Kasuga2, Y. J. Kim3, K. M. Kojima2, S.-H. Lee4, H. Niko2, J. M. Tranquada3, S. Uchida2, and M. v. Zimmermann5

  • 1Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7
  • 2Department of Applied Physics, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-8656, Japan
  • 3Physics Department, Brookhaven National Laboratory, Upton, New York 11973
  • 4NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
  • 5Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22603 Hamburg, Germany

  • *Email address: waki@physics.utoronto.ca
  • Present address: Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan.

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Vol. 67, Iss. 18 — 1 May 2003

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