Spin-flipping of magnetic sublattices in ferroelectric-antiferromagnets

It is shown that the exchange interaction between the electric and magnetic subsystems of a uniaxial ferroelectric-antiferromagnet leads to the appearance of a jump in the electrical polarization in the spin-flip field of the magnetic moments. This interaction can also cause the second-order phase transition to change into a first-order transition in strong magnetic fields. The temperature dependence of these effects is investigated.

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