The specific heat of two cubic laves compounds: TiBe2 and ThMg2 |
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| Authors: | G.R. Stewart B.T. Matthias A.L. Giorgi E.G. Szklarz J.L. Smith |
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| Affiliation: | 1. Los Alamos Scientific Laboratory, University of California, Los Alamos, N.M. 87545, USA;2. University of California at San Diego, La Jolla, CA 92093, USA;1. Bell Labs, Murray Hill, N.J. 07974, USA |
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| Abstract: | The low temperature specific heats of two isomorphous Laves compounds, TiBe2 and ThMg2, have been measured. The shape of the transition for the itinerant antiferromagnet TiBe2 is characteristic of magnetic ordering; the entropy of this transition is quite small, approximately 107 mJ/mole-K, a further indication of itinerancy. The γ, proportional to the density of states, is 42 mJ/mole-K2 for TiBe2, and the Debye temperature, θD, is 650 K. These numbers are compared to those for the itinerant ferromagnet, ZrZn2. The results for ThMg2 are γ=9.2 mJ/ mole-K2 and θD = 217 K. Results for both compounds are discussed in regards to the theory of Enz and Matthias. |
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