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Superparamagnetism in an aluminium substituted ferrihydrite (1986)

Chadwick, J. C. ; Jones, D. H. ; Thomas, M. F. ; [et al.]

Springer

Hyperfine interactions 28 (1986), S. 537-540

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ISSN: 1572-9540

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract Mössbauer spectra of aluminium doped ferrihydrites prepared by rapid evaporation of a nitrate solution are shown to exhibit doublet/sextet coexistence characteristic of superparamagnetism. In undoped ferrihydrite an additional broad “transitional” component is observed over a considerable temperature range; this component is absent from the spectra of samples with 〉66% aluminium. Possible causes of this change in behaviour on aluminium doping, including superferromagnetism, non-collinearity, ionic spin relaxation in the pure material, and the isolation of small clusters beyond the percolation limit in the doped material, are discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02061505

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