Magnetic ordering in Er3Cu4X4 (X = Si, Ge, Sn)

Magnetic ordering of the orthorhombic Er3Cu4X4 (X = Si, Ge, Sn) system has been studied using both 119Sn and 166Er Mossbauer spectroscopy, combined with neutron diffraction. We observe two distinct ordering events for the erbium moments on the 2d and 4e sites (TN (Er 2d) > TN (Er 4e)) and confirm...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2004-05, Vol.16 (18), p.3183-3198
Main Authors: Ryan, D H, Cadogan, J M, Gagnon, R, Swainson, I P
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Mössbauer effect
other γ-ray spectroscopy
Physics
Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
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Summary:Magnetic ordering of the orthorhombic Er3Cu4X4 (X = Si, Ge, Sn) system has been studied using both 119Sn and 166Er Mossbauer spectroscopy, combined with neutron diffraction. We observe two distinct ordering events for the erbium moments on the 2d and 4e sites (TN (Er 2d) > TN (Er 4e)) and confirm that the Er 2d moments are larger than those on the Er 4e site. Comparison of neutron diffraction with 166Er Mossbauer spectroscopy shows that the ordering of the Er 4e moments is far from complete, even at 0.7 TN, causing neutron diffraction analysis to severely underestimate the Er 4e moments in the Er3Cu4X4 system.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/16/18/019