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Attfield, J.P.; Berry, F.J.; Bland, J.; Beesley, A.M.; McLaughlin, A.C. and Thomas, M.F.
(2004).
DOI: https://doi.org/10.1088/0953-8984/16/6/022
Abstract
The magnetic environment of tin in the ferromagnetic superconductor RuSr2GdCu2O8 has been probed by doping 119Sn ions onto the ruthenium sites. The transferred magnetic hyperfine interaction at the tin site was measured by Mössbauer spectroscopy in the temperature range 4.2–300 K. The spectra show two distinct tin sites. One has four ruthenium nearest-neighbour cations and the other three ruthenium and one tin nearest neighbours. The temperature dependence of the hyperfine fields indicates an ordering temperature of 108 ± 5 K. The spectra favour parallel alignment of the field with the major axis of the electric field gradient indicating that the ruthenium moments are aligned along the crystallographic c axis.
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