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Regular version of the site

Article

Phase diagram of low-dimensional antiferromagnets with competing order parameters: A Landau-theory approach

V.N.Glazkov, Casola F., Ott H., Shiroka T.

We present a detailed analysis of the phase diagram of antiferromagnets with competing exchange-driven and field-induced order parameters. By using the quasi-1D antiferromagnet BaCu2Si2O7 as a test case, we demonstrate that a model based on a Landau type of approach provides an adequate description of both the magnetization process and of the phase diagram. The developed model not only accounts correctly for the observed spin-reorientation transitions, but it predicts also their unusual angular dependence.