Macroscopic quantum coherence in small antiferromagnetic particles

Ji Min Duan*, Anupam K Garg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

The Neel vector of a small antiferromagnetic particle can resonate between degenerate directions. The total moment of the particle will generally be non-zero, and this resonance cannot then occur without transverse anisotropy. Previous work is extended to include such anisotropy via a two-spin model representing the two sublattice moments. The WKB exponent in the tunnel splitting is found exactly when the sublattice moments are equal, and by a variational method that holds over the entire parameter space when the moments are unequal.

Original languageEnglish (US)
Article number023
Pages (from-to)2171-2181
Number of pages11
JournalJournal of Physics: Condensed Matter
Volume7
Issue number10
DOIs
StatePublished - Dec 1 1995

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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