Two-spin model for macroscopic quantum coherence in small antiferromagnetic particles

Ji Min Duan, Anupam Garg

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We develop a model for studying MQC in small antiferromagnetic particles in terms of two spins representing the total moment on two sublattices. The model can treat external magnetic fields and unequal sublattice moments, and is specifically designed to capture topological effects arising from the Berry phase in the spin action. The tunneling rate is calculated for several configurations; both the usual WKB exponent and the topological term depend on both the field and excess moment.

Original languageEnglish (US)
Pages (from-to)323-324
Number of pages2
JournalPhysica B: Physics of Condensed Matter
Issue numberPART 1
StatePublished - Feb 2 1994

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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