Inhaltszusammenfassung

The observed correlation in antiferromagnetic (AFM) ordering across a nonmagnetic spacer is interpreted in the framework of the phenomenological model. It is shown that the magnetostriction of one magnetically ordered layer produces a strain field of the same symmetry in the next magnetic layer via the spacer. Such an induced anisotropy favors a correlated orientation of the magnetic moments in all the layers. The value of the induced anisotropy is proportional to the magnetostriction constan...The observed correlation in antiferromagnetic (AFM) ordering across a nonmagnetic spacer is interpreted in the framework of the phenomenological model. It is shown that the magnetostriction of one magnetically ordered layer produces a strain field of the same symmetry in the next magnetic layer via the spacer. Such an induced anisotropy favors a correlated orientation of the magnetic moments in all the layers. The value of the induced anisotropy is proportional to the magnetostriction constant and it exponentially decreases with an increase of the spacer thickness. A corresponding short-range interaction gives rise to an ordering of the AFM layers throughout the film thickness and reveals itself in a linewidth of neutron diffraction spectra. Theoretical predictions are in satisfactory agreement with the available experimental data.» weiterlesen» einklappen

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Klassifikation

DFG Fachgebiet:
3.17 - Theoretische Chemie

DDC Sachgruppe:
Physik