Abstract

The elastic modulus C33 of terbium has been measured as a function of both temperature and magnetic field using one of the recently available high-purity specimens of terbium with a resistance ratio of rho 300/ rho 4.2=300. Results show that both the Curie temperature and the Neel temperature were different from the values reported earlier using lower-purity samples of the metal. The critical field Hc has also been deduced as a function of temperature throughout the antiferromagnetic phase region. It is concluded that sample purity is of crucial importance in studying the antiferromagnetic phase of terbium.

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