Band Magnetism with Inter-Site Correlations and Interactions

• Authors: J. Mizia , G. Górski , K. Kucab
• Languages of publication: EN

Abstracts

EN

We introduce the Hamiltonian to describe narrow band electrons. The physics of driving forces towards ferromagnetism is re-examined. Using different approximations it has been shown that the magnetic moments created by inter-site interaction and inter-site kinetic correlation decrease quickly with temperature. As a result of these interactions and the realistic density of states the Curie temperatures calculated after fitting magnetic moments to their low temperature values are realistic. In the past the Curie temperatures calculated using only the on-site interaction were much higher than the experimental temperatures.

Keywords

EN

71.10.Fd; 75.10.Lp; 75.50.Cc

Discipline

• 75.10.Lp: Band and itinerant models
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)
• 75.50.Cc: Other ferromagnetic metals and alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 4a
• Pages: A-30-A-32

Dates

published

2014-10

Contributors

author

J. Mizia

• Faculty of Mathematics and Natural Sciences, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

author

G. Górski

• Faculty of Mathematics and Natural Sciences, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

author

K. Kucab

• Faculty of Mathematics and Natural Sciences, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

References

• [1] J. Mizia, G. Górski, Models of Itinerant Ordering in Crystals: An Introduction, Elsevier Ltd., 2007, doi: 10.1016/B978-008044647-9/50007-X
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• [4] J.E. Hirsch, Phys. Rev. B 59, 6256 (1999), doi: 10.1103/PhysRevB.59.6256
• [5] G. Górski, J. Mizia, K. Kucab, arXiv:1312.3150
• [6] J. Kübler, Theory of Itinerant Electron Magnetism, Clarendon Press, Oxford 2000
• [7] J. Wahle, N. Blümer, J. Schlipf, K. Held, D. Vollhardt, Phys. Rev. B 58, 12749 (1998), doi: 10.1103/PhysRevB.58.12749
• [8] G. Górski, J. Mizia, Phys. Rev. B 83, 064410 (2011), doi: 10.1103/PhysRevB.83.064410
• [9] J. Hubbard, Phys. Rev. B 19, 2626 (1979), doi: 10.1103/PhysRevB.19.2626

Identifiers

DOI

10.12693/APhysPolA.126.A-30