Dipole-dipole interactions and the critical resistivity of gadolinium
Geldart, D. J. W.
Laubitz, M. J.
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Results are presented for the electrical resistivity of a c-axis single crystal of high-purity gadolinium metal in the immediate vicinity of the Curie temperature. Numerical analysis reveals that the data are not well described by the usual power laws in (T-Tc)/Tc but tend to exhibit a change in effective slope at Tc which can be described by classical Landau theory with logarithmic corrections. This is interpreted in terms of the dipole-dipole interactions, which are shown to become important at about 1 K above Tc. The authors suggest that gadolinium is a uniaxial dipolar ferromagnet in the asymptotic critical-behaviour regime
Geldart, D. J. W., K. De'Bell, J. Cook, and M. J. Laubitz. 1987. "Dipole-dipole interactions and the critical resistivity of gadolinium." Physical Review B (Condensed Matter) 35(16): 8876-9. Copyright © 1987 American Physical Society.