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

• Authors: J. Chovan , M. Marder , N. Papanicolaou
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

75.30.Ds; 75.30.Gw; 75.30.Kz

Discipline

• 75.30.Ds: Spin waves(for spin-wave resonance, see 76.50.+g)
• 75.30.Gw: Magnetic anisotropy
• 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)

• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 1
• Pages: 32-33

Dates

published

2014-07

Contributors

author

J. Chovan

• Department of Physics, Matej Bel University, Tajovského 40, 974 01 Banská Bystrica, Slovakia

author

M. Marder

• Center for Nonlinear Dynamics and Department of Physics, The University of Texas at Austin, Austin, Texas

author

N. Papanicolaou

• Department of Physics and Institute of Plasma Physics, University of Crete, Heraklion, Greece

References

• [1] I.E. Dzyaloshinskii, Sov.Phys. JETP 5, 1259 (1957)
• [1a] T. Moriya, Phys. Rev. Lett. 4, 228 (1960), doi: 10.1103/PhysRevLett.4.228
• [2] A. Zheludev, S. Maslov, G. Shirane, Y. Sasago, N. Koide, K. Uchinokura, Phys. Rev. Lett. 78, 4857 (1997), doi: 10.1103/PhysRevLett.78.4857
• [3] I.E. Dzyaloshinskii, Sov.Phys. JETP 20, 665 (1965)
• [4] J. Chovan, N. Papanicolaou, S. Komineas, Phys. Rev. B 65, 064433 (2002), doi: 10.1103/PhysRevB.65.064433
• [5] S. Mühlbauer, S. Gvasaliya, E. Pomjakushina, and A. Zheludev, Phys. Rev. B 84, 180406(R) (2011), doi: 10.1103/PhysRevB.84.180406
• [6] S. Mühlbauer, S. Gvasaliya, E. Ressouche, E. Pomjakushina, A. Zheludev, Phys. Rev. B 86, 024417 (2012), doi: 10.1103/PhysRevB.86.024417
• [7] J. Chovan, M. Marder, N. Papanicolaou, Phys. Rev. B 88, 064421 (2013), doi: 10.1103/PhysRevB.88.064421
• [8] N. Papanicolaou, Phys. Rev. B 55, 12290 (1997), doi: 10.1103/PhysRevB.55.12290

Identifiers

DOI

10.12693/APhysPolA.126.32