The pressure dependence of the Curie temperature of rare earth-cobalt compounds
- 1 December 1973
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 3 (12), 2218-2226
- https://doi.org/10.1088/0305-4608/3/12/021
Abstract
The pressure dependence of the Curie temperature (Tc) was determined up to 40 kbar for the compounds R2Co17 (R=Nd, Gd, Er, Y and Th), RCo5 (R=Gd, Y and Th), R2Co7 (R=Gd and Y), RCo3 (Gd, Y and Pr) and RCo2 (R=Gd and Tb). Single phase compounds with off-stoichiometric composition were included in this investigation. The experimental data are discussed in terms of the collective electron model. With few exceptions the pressure derivative of Tc of the various compounds can be represented by a general relation of the form dTc/dP=5/3 kappa Tc-5/6 kappa B/Tc with B=3.5*106K2 and Tc ranging from 400-1200K. For the compounds Y2Co17, YCo5, YCo3, YCo2, GdCo5, ThCo5 and Th2Co17 the compressibility kappa was determined.Keywords
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