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Quantum theory of easy plane antiferromagnets in a magnetic field

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The spin excitations of easy plane antiferromagnets with Dzyaloshinskii interactions in an external magnetic field of arbitrary direction are considered using the solution of the self-consistent quantum problem. The one-ion magnetization in the magnetic field is shown to be independent of the field only when S = 1/2; but when S = 1 the quantum equation for the spin configurations differs from the quasiclassical one. A theory of the interaction of different spin excitation branches is given without limitations on the parameters involved in the problem.

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Authors and Affiliations

  1. Institute for Theoretical Physics, Academy of Sciences of the Ukrainian SSR, Kiev, USSR

    V. M. Loktev & V. S. Ostrovskii

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  1. V. M. Loktev
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  2. V. S. Ostrovskii
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Loktev, V.M., Ostrovskii, V.S. Quantum theory of easy plane antiferromagnets in a magnetic field. J Low Temp Phys 43, 499–515 (1981). https://doi.org/10.1007/BF00115611

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