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2014 | 126 | 1 | 32-33
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Weak Ferromagnetism in the Helimagnet Ba_{2}CuGe_{2}O_{7}

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The Dzyaloshinskii-Moriya anisotropy, responsible for helimagnetism in Ba_{2}CuGe_{2}O_{7}, has recently been shown to comprise also a weak-ferromagnetic component. We theoretically demonstrate the signatures of weak-ferromagnetism in the magnon spectrum when a magnetic field is applied perpendicular to the z axis. We also anticipate the occurrence of unconventional domain walls in the so-called intermediate phase, and briefly elucidate the importance of the weak ferromagnetic component of the Dzyaloshinskii-Moriya anisotropy for the dynamics of driven domain walls.
  • Department of Physics, Matej Bel University, Tajovského 40, 974 01 Banská Bystrica, Slovakia
  • Center for Nonlinear Dynamics and Department of Physics, The University of Texas at Austin, Austin, Texas
  • Department of Physics and Institute of Plasma Physics, University of Crete, Heraklion, Greece
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