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Weak Ferromagnetism in the Helimagnet Ba_{2}CuGe_{2}O_{7}

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Chovan J., Marder M., Papanicolaou N.

Acta Physica Polonica A

2014

vol. 126

issue 1

32-33

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.

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1 Acta Physica Polonica A

1 2014

1 Chovan J.

1 Marder M.

1 Papanicolaou N.

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Weak Ferromagnetism in the Helimagnet Ba_{2}CuGe_{2}O_{7}