Magnetic Exchange Interactions and Estimation of T_N in CsNiF_3 from First Principles

• Authors: D. Legut , J. Rusz
• Languages of publication: EN

Abstracts

EN

The CsNiF_3 has been for long time studied as a prototype of quasi-1D planar ferromagnetic system. At very low temperature the studied system is insulator and therefore the magnetic exchange interactions should decay very rapidly. We treated the magnetic exchange coupling within the Heisenberg model for the nearest neighbor interaction between the anti-ferromagnetically coupled Ni-chains. The influence of up to the second-nearest neighbors on the ferromagnetic exchange coupling along the Ni-chains was determined. The exchange interactions were calculated for the experimental volume by the density functional theory, within the all-electron approach using the local density approximation for the exchange and correlation. The Néel temperature was calculated by means of the mean-field theory and by the random-phase approximation method.

Keywords

EN

75.10.Pq; 75.30.Et

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.10.Pq: Spin chain models

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 503-506

Dates

published

2008-01

received

2007-07-09

Contributors

author

D. Legut

• Institute of Physics of Materials, Academy of Sciences, Žižkova 22, 616 68 Brno, Czech Republic
• Department of Physics, Uppsala University, P.O. Box 530, 751 21 Uppsala, Sweden

author

J. Rusz

• Department of Physics, Uppsala University, P.O. Box 530, 751 21 Uppsala, Sweden
• Institute of Physics, Academy of Sciences, Na Slovance 2, 182 21 Prague, Czech Republic

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Identifiers

DOI

10.12693/APhysPolA.113.503