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High magnetic field thermal-expansion and elastic properties of CeRhIn$_5$

V. F. Correa·W. E. Okraku·J. B. Betts·A. Migliori·J. L. Sarrao·A. H. Lacerda
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Abstract

We report high magnetic field thermal-expansion and magnetostriction results on CeRhIn$_5$ single crystals. Several transitions, both first and second order, are observed when the field is applied perpendicular to the crystallographic c-axis. The magnetic field dependence of the thermal-expansion coefficient above 15 K, where the magnetic correlations are negligible, can be explained supposing an almost pure $| \pm 5/2>$ ground state doublet, in apparent contradiction with neutron scattering experiments. Although the spin-lattice interaction is relevant in this compound, the effect of the magnetic correlations on the elastic properties is relatively weak, as revealed by resonant ultrasound spectroscopy experiments.

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V. F. Correa, W. E. Okraku, J. B. Betts, A. Migliori, J. L. Sarrao, A. H. Lacerda. 2004-11-15. High magnetic field thermal-expansion and elastic properties of CeRhIn$_5$. https://doi.org/10.1103/physrevb.72.012407

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