Ordered Phases and Magnetic Excitations in Doped Manganites

• Authors: O. Sikora , A. Oleś
• Languages of publication: EN

Abstracts

EN

We present theoretical models concerning magnetic and charge ordering in half-doped manganites. The new approach to microscopic description of this group of compounds, taking into consideration the oxygen degrees of freedom, is discussed. The spin wave dispersion relations are shown both in the model of effective spins on Mn ions and in the new approach when two Mn ions form a large effective spin S=7/2.

Keywords

EN

75.47.Lx; 75.30.Ds; 75.50.Ee

Discipline

• 75.30.Ds: Spin waves(for spin-wave resonance, see 76.50.+g)
• 75.50.Ee: Antiferromagnetics
• 75.47.Lx: Magnetic oxides

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 106
• Issue: 5
• Pages: 659-664

Dates

published

2004-11

received

2004-06-06

Contributors

author

O. Sikora

• Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland

author

A. Oleś

• Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland

References

• 1. S. Yunoki, T. Hotta, E. Dagotto, Phys. Rev. Lett., 84, 3714, 2000; O. Sikora, A.M. Oleś, Phys. Status Solidi B, 236, 380, 2003; J. Bała, P. Horsch, F. Mack, Phys. Rev. B, 69, 094415, 2004
• 2. A. Daoud-Aladine, J. Rodriguez-Carvajal, L. Pinsard-Gaudart, M.T. Fernández-Diaz, A. Revcolevschi, Phys. Rev. Lett., 89, 097205, 2002
• 3. G. Zeng, C.H. Patterson, Phys. Rev. B, 67, 220404, 2003
• 4. C.I. Ventura, B. Alascio, Phys. Rev. B, 68, 020404, 2003
• 5. L.R. Walker Spin Waves and Other Magnetic Modes in Magnetism, Academic Press, London 1963
• 6. N.P. Konstantinidis, C.H. Patterson, Phys. Rev. B, 70, 064407, 2004
• 7. D.V. Efremov, J. van den Brink, D.I. Khomskii, cond-mat/0306651 (2003)

Identifiers

DOI

10.12693/APhysPolA.106.659