Reentrant spin-flop transition in nanomagnets

  title={Reentrant spin-flop transition in nanomagnets},
  author={Mattia Crescioli and Paolo Politi and Ruggero Vaia},
  journal={Physical Review B},
Antiferromagnetic chains with an odd number of spins are known to undergo a transition from an antiparallel to a spin-flop configuration when subjected to an increasing magnetic field. We show that in the presence of an anisotropy favoring alignment perpendicular to the field, the spin-flop state appears for both weak and strong fields, the antiparallel state appearing for intermediate fields. Both transitions are second order, the configuration varying continuously with the field intensity… 
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