Anomalies in the elastic constants of antiferromagnetic uranium mononitride |
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Authors: | CF van Doorn P de V du Plessis |
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Institution: | Department of Experimental and Theoretical Physics, Rand Afrikaans University, Johannesburg, South Africa |
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Abstract: | Measured anomalies in the elastic constants of a single crystal of cubic anti-ferromagnetic uranium mononitride are reported. A dip of about 10% occurs in C11 at 6 K below the Néel point . Starting at TN a renormalization in C44 which is proportional to the square of the sublattice ,magnetization also occurs. The results are in general agreement with model calculations of the sound velocity renormalization due to spin-phonon interactions. |
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