ISSN:
1434-6036
Schlagwort(e):
PACS. 75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarised electron studies, synchrotron-source X-ray scattering, etc.). – 75.40.Cx Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.) – 78.70.Ck X-ray scattering
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract: We report on an investigation of the magnetic properties of Gd x Eu 1 - x S mixed crystals with compositions in the range of 0.6 〈 x 〈 1. For the two samples Gd 0.8 Eu 0.2 S and Gd 0.73 Eu 0.27 S a long-range antiferromagnetic order was observed at low temperatures. Element-specific measurements exhibited a different temperature dependence of the reduced sublattice magnetisation of the two magnetic species. A model calculation and Monte Carlo simulations revealed that the different temperature dependence is due to frustration effects. These frustration effects lead to a breakdown of the long-range order for higher europium contents. For the Gd 0.67 Eu 0.33 S-sample we were able to observe a short-range antiferromagnetic order with correlation lengths of a few 10Å with X-ray resonance exchange scattering.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1140/epjb/e20020090
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