Quantum Coherence in Small Antiferromagnets

S. E. Barnes, R. Ballou, B. Barbara, and J. Strelen
Phys. Rev. Lett. 79, 289 – Published 14 July 1997
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Abstract

An antiferromagnetic particle with an excess spin j has 2 degrees of freedom. The one associated with j is ferromagnetic, while the antiferromagnetic behavior involves Néel vector n. It is shown that the spin-parity effect described by Loss et al. has to do with the ferromagnetic degree of freedom and does not imply the localization of n for small enough particles for half-integer spin. It is also shown that the tunnel splitting associated with n is insensitive to applied fields.

  • Received 25 February 1997

DOI:https://doi.org/10.1103/PhysRevLett.79.289

©1997 American Physical Society

Authors & Affiliations

S. E. Barnes1,2, R. Ballou1, B. Barbara1, and J. Strelen2

  • 1Laboratoire de Magnétisme Louis Néel, CNRS, B.P. 166, 38042 Grenoble Cedex 9, France
  • 2Department of Physics, University of Miami, Coral Gables, Florida 33124

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Vol. 79, Iss. 2 — 14 July 1997

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