PMID: 15245057Jul 13, 2004Paper

Origin of higher order magnetic exchange: evidence for local dimer exchange striction in CsMn0.28Mg0.72Br3 probed by inelastic neutron scattering

Physical Review Letters
Th SträssleH-U Güdel

Abstract

The origin of higher-order exchange interactions in localized S-state systems has been the subject of intensive investigations in the past. In particular, it has been suggested that a biquadratic exchange term may arise from the magnetoelastic energy. Here we report on the pressure and temperature dependence of the excitation spectra of magnetic Mn2+ dimers in CsMn0.28Mg0.72Br3 probed by inelastic neutron scattering. Biquadratic exchange and a strong distance dependence of the bilinear exchange are observed. It is shown that the mechanism of local exchange striction may explain the occurrence of biquadratic exchange in accordance with the elastic properties of the compound.

References

Jan 1, 1989·Physical Review. B, Condensed Matter·T E MasonM F Collins
Jun 1, 2001·Physical Review Letters·R ColdeaZ Fisk
Oct 4, 2003·Physical Review Letters·Andreas MoserEric E Fullerton
Nov 13, 2003·Physical Review Letters·C ReichE Rastelli

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Citations

Mar 17, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·B P AlhoP J von Ranke
Jan 14, 2009·Journal of Physics. Condensed Matter : an Institute of Physics Journal·P S HäfligerA Furrer
May 29, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Suman Kalyan PradhanSubodh Kumar De

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