Magnetic Behavior of Thin Films of Nickel and Gadolinium Near the Curie Point
- 1 March 1966
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 37 (3) , 1266-1267
- https://doi.org/10.1063/1.1708429
Abstract
Magnetization measurements have been made on thin films of nickel and gadolinium near the Curie point using a torque technique. The films were prepared by evaporation in pressures of 10−7 and 10−8 Torr. Most of the measurements were made with a torsion magnetometer and the others with an automatic torquemeter system. The relative magnetization σ near but below Tc is described by σ = D(1−τ)f, where τ = T/Tc. The value of f is obtained by using the procedure of Callen and Callen. Plots of σ(1−f)/fdσ/dτ for nickel films were flat for f = ½ for temperatures 0.90<τf = ⅓ are observed at lower temperatures. Gd films gave f = 0.6 for temperatures 0.8<τ0.9. The ½‐power behavior is in agreement with molecular‐field theory and the Landau theory for second‐order transitions.This publication has 7 references indexed in Scilit:
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