Neutron Scattering Investigation of Magnetic Bilayer Correlations in La1.2Sr1.8Mn2O7: Evidence of Canting above TC

R. Osborn, S. Rosenkranz, D. N. Argyriou, L. Vasiliu-Doloc, J. W. Lynn, S. K. Sinha, J. F. Mitchell, K. E. Gray, and S. D. Bader
Phys. Rev. Lett. 81, 3964 – Published 2 November 1998
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Abstract

Neutron scattering investigations of the paramagnetic correlations in the layered manganite La1.2Sr1.8Mn2O7, which exhibits colossal magnetoresistance above the Curie transition at TC=112K, show that spins in neighboring layers within each bilayer are strongly canted at an average angle that is dependent on both the magnetic field and the temperature, as predicted by de Gennes. The in-plane correlation length does not diverge at TC, although the magnetic Bragg intensity obeys critical scaling below TC, with the same temperature dependence as the zero-field electrical conductance.

  • Received 10 November 1997

DOI:https://doi.org/10.1103/PhysRevLett.81.3964

©1998 American Physical Society

Authors & Affiliations

R. Osborn1, S. Rosenkranz1, D. N. Argyriou2, L. Vasiliu-Doloc3,*, J. W. Lynn3,†, S. K. Sinha1, J. F. Mitchell1, K. E. Gray1, and S. D. Bader1

  • 1Argonne National Laboratory, Argonne, Illinois 60439
  • 2Manual Lujan, Jr. Neutron Scattering Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
  • 3NIST Center for Neutron Research, National Institute of Science and Technology, Gaithersburg, Maryland 20899

  • *Also at the University of Maryland, College Park, MD 20742.

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Vol. 81, Iss. 18 — 2 November 1998

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